Tesla Trunk Won't Stay Open? Replace the Struts in 20 Minutes (All Models, 2026)

At a Glance: Tesla Trunk Strut Replacement (2026)

Your Tesla trunk barely lifts itself anymore. It opens halfway and stops, or you have to hold it up with one hand while grabbing groceries with the other. Maybe it used to pop open automatically but now just sort of drifts upward like it's tired. Sound familiar?

Worn trunk struts (also called lift supports or gas springs) are one of the most common Tesla issues after 3-5 years of ownership. The fix is straightforward, takes 20-45 minutes, and costs $40-120 depending on whether you have power or manual struts.

Here's the catch: Model 3 and Model Y use completely different trunk/liftgate designs, and the strut replacement process differs significantly between them. This guide covers all models including the 2024+ Juniper and Highland facelifts.

Quick Reference: Tesla Trunk Strut Facts (2026)

Table of Contents

1. Symptoms: How to Tell Your Struts Are Failing
2. Is It the Strut, the Motor, or the Ball Stud?
3. Model 3 vs Model Y: Key Differences
4. Model Y Juniper (2024+): What Changed
5. Model S and Model X: Trunk Strut Overview
6. Power Struts vs Manual Gas Struts
7. What You'll Need
8. Step-by-Step: Model 3 Power Strut Replacement
9. Step-by-Step: Model Y Liftgate Strut Replacement
10. Model 3 Manual Strut Upgrade
11. Touchscreen Calibration After Replacement
12. Troubleshooting After Replacement
13. OEM Part Number Reference
14. Where to Buy: US and EU Buying Guide
15. Aftermarket Brand Quality Comparison
16. Pre-Purchase Inspection for Used Tesla Buyers
17. Strut Force Rating Guide
18. Testing Remaining Strut Force (5-Minute Method)
19. Ball Stud Replacement
20. Power Trunk Upgrade Kit Guide (Model 3)
21. Cost Comparison
22. Frequently Asked Questions
23. Common Mistakes That Cause Callbacks
24. Real-World Tips From a Tesla Repair Shop
25. Model S Rear Trunk: Full Step-by-Step
26. Model X Cargo Liftgate: Full Step-by-Step
27. Fault Code Reference
28. 2026 Firmware Updates Affecting Trunk Behavior
29. Climate-Based Replacement Schedule
30. EU Workshop Case Studies
31. Strut Dimensional Specifications
32. EU Cost Reality: Mobile Service vs. Workshop vs. DIY
33. Tesla Cybertruck: Frunk Struts and Vault Cover

Symptoms: How to Tell Your Struts Are Failing

• Trunk won't stay fully open — sags down under its own weight
• Slow rise — trunk opens sluggishly instead of popping up
• Trunk stops halfway — doesn't reach full open position
• Power trunk makes grinding/straining noises — motor working harder to compensate
• Oil residue on the strut cylinder — seal failure, gas is leaking
• Trunk drops when releasing — no gas pressure remaining at all
• Uneven opening — one side lifts faster than the other (one strut failing)

Is It the Strut, the Motor, or the Ball Stud? Diagnose Before You Order

Replacing the wrong component wastes time and money. Run through this checklist before ordering struts.

Step 1: Check the Error Message First

Open the touchscreen and go to Controls > Service > Liftgate (or Trunk). If you see:

• "Liftgate unable to open/close fully" + motor grinding noise → likely strut failure (motor is fighting dead gas pressure)
• "Liftgate power failure" or the trunk doesn't respond at all → check the 12V fuse first (fuse F17 or F22 depending on year), not the strut
• No error, trunk just feels weak → classic strut gas pressure loss, replace struts

Step 2: Inspect the Strut Cylinder

With the trunk open and propped, look directly at the strut shaft:

• Oil or grease residue on the shaft → seal has failed, gas is escaping. Replace immediately.
• Rust or corrosion on the shaft → moisture has entered, accelerating failure
• No visible damage, just weak lift → internal gas pressure has dropped over time (normal wear after 3-6 years)

Step 3: Test the Ball Studs

Grab the strut end-cap and wiggle it firmly. A good ball stud has zero play. If you feel:

• Wobble at the ball stud → replace ball stud before installing new struts (new struts won't clip securely onto a worn ball)
• Corrosion or flat spot on ball → same — replace the stud. Ball studs on Model 3 cost ~$8-12 OEM; Model Y ~$10-15

Step 4: Is the Motor Still Good?

Disconnect the power strut electrical connector (see Step 2 of the main procedure) and manually push the trunk open and closed. If the trunk holds firm when you apply force with your hand — but won't stay open on its own — the motor is still functional and only the gas spring portion of the strut has failed. This is the normal failure pattern.

If the motor doesn't respond even after replacing struts and running calibration, check the trunk limit switch (located on the body near the lower ball stud) and the wiring grommet for pinched wires.

Model 3 vs Model Y: Key Differences

This is important to understand before ordering parts or starting the job.

Tesla Model 3 (2017-2023) — Trunk Lid (Sedan)

The Model 3 has a traditional sedan trunk lid that hinges upward. It's relatively light compared to the Model Y liftgate.

• Pre-2024 Model 3: Has two trunk struts — either manual gas struts or power struts (with electric motor) depending on trim and year
• Strut type: Clips onto ball studs at both ends (upper on trunk lid, lower on body)
• Power struts have an electrical connector that must be disconnected before removal

OEM Part Numbers (Model 3 Power Struts):

• LH (Left): 1551488-00-C (also 1551488-98-B, 1551488-99-B)
• RH (Right): 1551489-00-C

Tesla Model 3 Highland (2024+) — Power Trunk Standard

The 2024+ Model 3 Highland refresh standardized the power trunk across all trim levels. If you own a 2024+ Model 3:

• All vehicles ship with powered lift support (no manual strut option)
• The part numbers carry over from the 2023 model (1551488-00-C / 1551489-00-C) but verify via your VIN
• The Highland's revised trunk lid geometry means the struts sit at a slightly different angle — confirm your replacement struts match the original length (measured fully extended and fully compressed)

Tesla Model Y (2020-2023) — Liftgate (SUV/Hatchback)

The Model Y has a large rear liftgate (hatchback-style) that's significantly heavier than the Model 3 trunk lid. This means:

• Struts need higher force ratings to support the heavier liftgate
• All Model Y vehicles come with power liftgate as standard
• The struts have electrical connectors and route through grommets in the body
• Replacement requires accessing the area between the headliner and roof glass

OEM Part Numbers (Model Y Power Struts):

• LH (Left): 1500601-00-A
• RH (Right): 1500602-00-A

Model Y Juniper (2024+): What Changed

The 2024 Model Y Juniper refresh brought meaningful liftgate changes that affect strut replacement:

Liftgate design updates:

• Revised glass geometry with a wider rear pillar — slightly different strut mounting angle than pre-facelift Model Y
• The Juniper uses the same basic power strut mechanism but with updated part numbers in some markets. At time of writing (April 2026), part number 1500601-00-A / 1500602-00-A still fits pre-facelift and Juniper units, but always confirm via parts.tesla.com with your VIN
• The headliner access procedure (Step 2 in the Model Y guide below) is the same — inflatable air wedge technique still applies

Juniper-specific note: Several owners on Tesla forums report the Juniper's liftgate feels heavier than the pre-facelift version. If you're installing aftermarket struts, choose a force rating at or above OEM spec — going lighter will result in the same slow-open symptom you started with.

Model S and Model X: Trunk Strut Overview

Tesla Model S

The Model S has two trunk systems: a rear trunk (frunk/trunk lid) and a front trunk (frunk). Most strut failures occur on the rear trunk.

• Rear trunk: Power liftgate with electric struts — similar clip-on ball stud design to Model 3
• Frunk: Manual gas struts on most trims
• Part numbers vary by facelift generation (pre-2021 "Raven" vs. post-2021 "Plaid" refresh)
• Look up your VIN at service.tesla.com before ordering — the 2021+ Model S refresh changed strut geometry

Aftermarket options are available on Amazon US and DE for the pre-2021 Model S rear trunk. For 2021+ Plaid, OEM parts are more reliable due to lower aftermarket coverage at this time.

Tesla Model X

The Model X situation is unique:

• Falcon Wing Doors (rear passenger doors) use actuators, not struts — their failure is covered in a separate procedure
• The rear cargo liftgate uses a power liftgate strut similar to Model Y
• The frunk (front trunk) uses manual gas struts

If your Model X falcon wing door won't stay up or moves erratically, that's not a strut issue — it's the door actuator or limit switch. The procedure in this guide covers the cargo liftgate only.

For falcon wing door repairs, consult the Tesla Service Manual (correction code 1191600110) or book a Tesla Service appointment — the falcon wing actuators are high-voltage adjacent and best left to professionals.

Power Struts vs Manual Gas Struts

Power Struts (Motorized)

• Found on: All Model Y, Model 3 with power trunk option, all 2024+ Model 3 Highland
• Have an electric motor built into the strut that actively opens/closes the trunk
• Include an electrical harness connector — you must disconnect it during replacement
• More expensive ($80-120 per pair aftermarket, $150-200+ OEM)
• Tesla correction code: 1133070022 (Model 3), 11334202 (Model Y)

Manual Gas Struts (Passive)

• Found on: Some early Model 3 base/SR+ trims (2017-2020) without power trunk
• Pure gas springs — no motor, no electrical connection
• Simply provide lift assist when you manually open the trunk
• Cheaper ($30-60 per pair)
• Popular upgrade option: Replace weak OEM manual struts with stronger aftermarket ones for automatic opening

What You'll Need

Tools

• Plastic trim removal tools (for trunk garnish/trim)
• Clean microfiber cloths
• Isopropyl alcohol (IPA) wipes — for cleaning ball studs before install
• A prop rod or sturdy stick to hold the trunk/liftgate open during replacement
• Inflatable air wedge bag (Model Y — to access connector behind headliner)

Parts

• Replacement struts — always replace as a pair (left and right)
• If ordering aftermarket, verify compatibility with your model year

Step-by-Step: Model 3 Trunk Strut Replacement (Power Struts)

Based on Tesla Service Manual procedure — correction code 1133070022, FRT 0.12 hrs

Step 1: Remove Trunk Garnish (Interior Trim)

Open the trunk fully. You need to remove the interior trunk garnish (trim panel) to access the power strut's electrical connector.

1. Use a plastic trim tool to carefully pry the trunk garnish panel
2. Work around the clips — they pop off with moderate force
3. Set the garnish aside

Step 2: Disconnect the Electrical Harness

Near the LH (left-hand) side of the vehicle interior where the trunk garnish was removed:

1. Locate the trunk power strut electrical connector
2. Press the release tab and disconnect the harness

Step 3: Push the Rubber Grommet Through

The power strut's wiring passes through the body via a rubber grommet:

1. Locate the rubber grommet where the strut harness passes through the body panel
2. Push the grommet through from the interior side

Step 4: Support the Trunk

This is critical. Before removing struts:

1. Use a prop rod, sturdy stick, or have a helper hold the trunk lid open
2. Without strut support, the trunk lid will fall and could cause injury or damage

Step 5: Release the Upper Ball Stud Clip

1. Locate the clip connecting the upper end of the strut to the trunk lid ball stud
2. Use a flat trim tool or your fingers to release the clip
3. Pull the strut end off the ball stud

Step 6: Release the Lower Ball Stud Clip

1. Release the clip attaching the lower end of the strut to the body-side ball stud
2. Remove the strut from the vehicle

Step 7: Install the New Strut

Installation is the reverse:

1. Clean both ball studs with an IPA wipe — this ensures a secure clip connection
2. Attach the lower end first — clip it onto the lower body-side ball stud
3. Attach the upper end — clip onto the upper trunk lid ball stud
4. Verify both clips are fully seated — tug gently to confirm

5. Remove the trunk prop
6. Pull the rubber grommet back through the body panel
7. Reconnect the electrical harness connector
8. Reinstall the trunk garnish

Step 8: Test

1. Close the trunk fully
2. Open it using the button/touchscreen/key fob
3. Verify it opens fully and holds position
4. Close it and verify smooth operation
5. Repeat a few times to confirm

Step-by-Step: Model Y Liftgate Strut Replacement (Power Struts)

Based on Tesla Service Manual procedure — correction code 11334202, FRT 0.18 hrs

The Model Y procedure is slightly more involved because you need to access the strut connector behind the rear headliner.

Step 1: Open Liftgate and Rear Door

1. Open the liftgate fully
2. Open the LH (left) rear door — this gives you access to the headliner area

Step 2: Access the Connector Behind the Headliner

This is the trickiest part of the Model Y procedure:

1. Position an inflatable air wedge bag between the rear headliner and the roof glass
2. Gently inflate to create a gap that lets you reach the power strut connector
3. Apply tape to the headliner edges as needed to prevent scratching

Step 3: Disconnect the Power Strut Connector

1. Reach behind the headliner through the gap you created
2. Disconnect the liftgate power strut electrical connector

Step 4: Release the Harness Grommet

1. Release the tabs that attach the electrical harness grommet to the body
2. Pull the grommet free from the body panel

Step 5: Support the Liftgate

1. Use a prop rod to support the liftgate — it's heavy
2. The Model Y liftgate weighs significantly more than a Model 3 trunk lid

Step 6: Release the Lower Ball Stud

1. Release the lower liftgate power strut from the ball stud attached to the vehicle body
2. Control the strut as you release it

Step 7: Release the Upper Ball Stud and Remove

1. Release the upper liftgate power strut from the ball stud on the liftgate
2. Remove the strut from the vehicle

Step 8: Install the New Strut

1. Clip the upper ball stud first (opposite order from Model 3) — attach to the liftgate
2. Clip the lower ball stud — attach to the vehicle body
3. Route the electrical harness through the body and secure the grommet
4. Connect the liftgate power strut electrical connector
5. Remove the inflatable air wedge bag from between the headliner and roof glass
6. Close the liftgate and rear door

Step 9: Test

1. Open the liftgate using the button on the liftgate, touchscreen, or key fob
2. Verify it opens fully and holds position
3. Close and reopen several times
4. Listen for any unusual noises

Model 3 Manual Strut Upgrade (Non-Power Trunk)

If your Model 3 has the non-power trunk (common on 2017-2020 Standard Range / SR+ models), you have simple gas struts with no electrical connections. The replacement is even simpler:

1. Prop the trunk open
2. Release the clip on the upper ball stud
3. Release the clip on the lower ball stud
4. Remove old strut
5. Clean ball studs with IPA
6. Clip new strut onto lower ball stud
7. Clip new strut onto upper ball stud
8. Remove prop and test

Upgrade tip: The factory manual struts are designed to assist opening — you still need to push the trunk up. Aftermarket struts from brands like OTUAYAUTO or ARANA use higher force ratings that pop the trunk open fully — like having a power trunk without the motor.

Touchscreen Calibration After Replacement

After replacing power struts on any model, run a calibration sequence so the trunk/liftgate motor relearns the new strut's resistance profile. Skipping this causes erratic behavior — the trunk may open only partway or stop before it's fully closed.

How to Calibrate the Liftgate (Model Y)

1. Close the liftgate fully
2. On the touchscreen: Controls > Service > Calibrate Liftgate
3. The liftgate will automatically open and close 3-4 times — this is normal
4. Do not interrupt the cycle
5. After calibration completes, test manual and auto-close operation

How to Calibrate the Trunk (Model 3)

1. Close the trunk fully
2. On the touchscreen: Controls > Service > Calibrate Trunk (available on software 2023.20+)
3. If the menu item isn't visible on your version, perform 3 full manual open/close cycles — the system auto-recalibrates after several operations

Adjusting Opening Height

To adjust how far the trunk/liftgate opens:

• Model Y: Controls > Vehicle > Liftgate > Adjust liftgate opening height
• Model 3: Controls > Vehicle > Trunk > Adjust trunk opening height

Set the height by stopping the liftgate at your preferred position and tapping "Save." This is useful in garages with low clearance.

Troubleshooting After Replacement

Trunk still won't stay open

• Verify both clips are fully seated on the ball studs
• Check if ball studs themselves are worn or damaged — they can be replaced separately
• For Model Y, see Ball Stud - Liftgate procedure in the Tesla Service Manual

Power trunk opens/closes erratically

• Run the touchscreen calibration procedure above
• Make sure the electrical connector is fully seated
• Check for pinched wires in the grommet

Trunk opens too far or not far enough

• If you installed aftermarket upgraded struts (higher force), the trunk may open more aggressively — this is normal
• Adjust the trunk opening height via the touchscreen as described above

Clicking or popping noise after install

• Ball studs may need replacement
• Clips may not be fully seated
• Apply a small amount of silicone grease to the ball studs

New strut sagging after a few weeks

• Cheap aftermarket struts from unknown brands have a failure rate within 3-6 months
• Return and replace with a reputable brand (TRQ, Getfarway, A-Premium) or OEM

OEM Part Number Reference

*Verify via your VIN at parts.tesla.com — Juniper-specific revisions may apply in your market.

Strut Dimensional Specifications: Verify Before Ordering

When aftermarket listings don't specify year compatibility, or when buying from non-Amazon EU sources, measure your existing struts before they fully fail to confirm you're ordering the correct replacement.

How to Measure Your Struts

1. Open the trunk to full-open position and prop it independently
2. Measure from ball-socket center to ball-socket center with the strut at full extension — this is the fully extended length
3. Compress the strut gently by hand and measure again — this is the compressed length
4. Measure the shaft diameter with a caliper at the clean, smooth shaft section at least 30 mm above the seal (not in the seal zone, where a ridge forms)

Approximate OEM Reference Dimensions (Community-Measured)

These are community-measured reference values from multiple units. Tesla does not publish official strut specifications. Verify against your removed strut before placing an order.

Compatibility tolerance: A difference of ±15 mm in extended length is typically still functionally compatible. A difference of more than 20 mm means you have the wrong part — the strut will bottom out before the trunk reaches full open or will over-extend the ball stud clip.

Ball socket end fitting: All Tesla trunk power struts use a 14 mm ball socket clip. Aftermarket struts must specify 14 mm — not 10 mm or 12 mm — or the clip will not seat securely on the OEM ball studs. Manual gas struts (non-power Model 3) also use 14 mm sockets.

Model X note: The Model X cargo liftgate struts use a slightly larger shaft (12 mm) and body diameter (25 mm) than Model 3/Y. Do not order Model Y struts for a Model X — they will physically mount but the force rating is 80–125N below what the heavier Model X liftgate requires.

Where to Buy: US and EU Buying Guide

United States (amazon.com — tag: diyrepair07-20)

Europe (amazon.de — tag: diyrepair-21)

OEM and Specialist Sources (EU)

• Tesla Parts Shop — shop.tesla.com/en_DE — OEM struts, verify VIN first
• Tesloid.eu — carries OEM-equivalent struts for Model 3 and Y, ships EU-wide
• eBay.de / kleinanzeigen.de — used OEM struts from salvage vehicles; functional but gas pressure uncertain. Acceptable for short-term use only.

If you're in Lithuania or the Baltics, sourcing from Amazon.de typically arrives in 3-5 days with standard shipping.

Aftermarket Brand Quality Comparison (2026)

Not all aftermarket Tesla trunk struts are created equal. This is a real ranking based on community reports and our repair shop experience:

Recommendation: For power struts, choose TRQ or A-Premium for Model 3, Getfarway for Model Y liftgate. For manual-to-auto upgrade on Model 3, EVANNEX is worth the premium.

Force rating matters: Never install struts rated below OEM spec. For Model Y Juniper owners — reports indicate the 2024+ liftgate is slightly heavier than pre-facelift. If using aftermarket struts, choose those explicitly listed for 2024+ or with higher force ratings (80N+ per strut).

Pre-Purchase Inspection: Trunk Strut Health for Used Tesla Buyers

Buying a used Tesla Model 3 or Y? The trunk strut condition reveals a lot about how the car was maintained — and failing struts are a $200-400 dealer repair if you don't negotiate it into the price.

3-minute trunk inspection at the test drive:

1. Open the trunk and let go immediately. A healthy trunk stays fully open with no movement. Any sag = struts are failing.
2. Time the opening speed. A good power trunk goes from closed to fully open in 3-4 seconds on Model Y. Sluggish (5+ seconds) = struts are on the way out, motor is compensating.
3. Listen for motor strain. A grinding or whirring sound during the last 20% of opening is the power strut motor fighting dead gas pressure. Budget for replacement.
4. Look at the strut shaft. Shine your phone light at the strut cylinder. Oil residue = seal failure, often within months of full failure.
5. Press down on the open trunk lid firmly. A healthy strut resists immediately. If the lid gives before springing back, gas pressure is borderline.

Negotiating tip: Aftermarket strut replacement is a $40-90 DIY job. If the trunk shows failure signs, ask for $200-300 off to cover a service center fix — or do it yourself the week after purchase.

Also check: Tesla Used Buying & Inspection Guide for the full pre-purchase checklist.

Strut Force Rating Guide: Choosing the Right N Rating

Every gas strut has a force rating in Newtons (N) — the amount of upward push it provides at full extension. Choosing the wrong rating is the most common reason aftermarket struts cause the same slow-open symptom you started with, or make the trunk slam closed too aggressively.

OEM Force Ratings by Model

These are estimated gas force values based on measured panel weights and OEM performance benchmarks. Tesla does not publish strut force specs — these figures are derived from engineering calculations and community measurements. Power struts add electric motor torque on top of these gas values.

How to Read Aftermarket Listings

When shopping, look for the fully extended force or holding force — the value that keeps the trunk up at full open. Aftermarket listings typically state this in lbs or N:

Rules for Choosing Force Rating

For Model 3 (all years): Choose struts rated 85-90 lbs (380-400N) per strut.

For Model Y pre-Juniper (2020-2023): Choose struts rated 110-112 lbs (490-500N) per strut.

For Model Y Juniper (2024+): Choose struts rated 110-120 lbs minimum. The Juniper liftgate is approximately 1 kg heavier than the pre-facelift version — several owners report pre-Juniper rated struts feel slightly soft on the new model.

For Model S (2021+): OEM struts are strongly recommended. Aftermarket coverage for the 2021+ Plaid refresh is thin, and mismatched force ratings can affect the power liftgate motor's calibration in ways that are difficult to diagnose without a service tool.

Never go lighter than OEM. A strut that cannot support the panel weight will compress under load, creating the exact slow-rise symptom you started with. Replacing a $40 strut twice is more expensive than buying the correct rating once.

Testing Remaining Strut Force (5-Minute Method)

You can estimate how much gas pressure your struts have left using a push test or a fish scale — no removal required. This tells you whether you're at 60% capacity (schedule replacement) or near zero (replace immediately), and is essential before buying a used Tesla or ordering parts after a 2025.44+ firmware alert.

Method 1: Push-Down Force Test (No Tools Needed)

1. Open the trunk fully — do not prop it, let the struts hold the weight
2. Place one hand flat on the trunk lid near the strut mounting point (halfway along the lid, not at the latch edge)
3. Push downward with steady, increasing pressure

What the resistance tells you:

Method 2: Fish Scale (Luggage Scale) Test — Most Accurate

What you need: A digital fish scale / luggage scale rated to at least 30 kg, available on Amazon for under €15.

1. Open the trunk fully and hook the scale's loop to the trunk lid's center rear edge
2. Remove all independent support — let the struts hold the lid and the scale
3. Read the combined upward force shown on the scale

Interpreting the reading:

Thresholds based on OEM gas force ratings (380N Model 3, 490N Model Y) and typical panel weights, accounting for the geometric leverage angle of the strut mount.

When to Use This Test

• Before buying a used Tesla: Takes 3 minutes during your test drive and tells you whether to negotiate strut cost into the price.
• Autumn check (September in Baltic/Nordic climates): Struts that pass in summer may fail at −20°C when gas pressure drops 15–20%. Catching borderline struts in September means replacing in a warm garage, not a frozen parking lot in January.
• After a 2025.44+ firmware alert: The updated torque sensing triggers "Liftgate obstructed" alerts at lower strut degradation levels than previous firmware. Run the push test before ordering parts — many are firmware-triggered false positives on 50–70% pressure struts.

Ball Stud Replacement: When and How

Ball studs are the threaded anchor posts on the body and trunk lid that the strut clips snap onto. They are small, inexpensive, and routinely overlooked — but a worn ball stud will cause your brand-new struts to click, wobble, or detach entirely within weeks.

When to Replace Ball Studs

Replace ball studs whenever:

• You feel any wobble when gripping the strut end-cap and rocking it firmly after strut removal
• The ball surface has visible flat spots, corrosion pitting, or rough texture
• The new strut clip does not snap on with a firm, audible click
• You are installing new struts after 5+ years of use — ball stud replacement takes 10 minutes and costs $8-15 per stud

Parts and Sourcing

Ball studs are available from Tesla parts suppliers including Tesloid.eu (EU) and EVMotive.com (US), often cheaper than direct from Tesla. Always confirm with your VIN — ball stud thread size and shoulder diameter have changed between production runs.

Step-by-Step: Ball Stud Replacement

Tools needed: Ball stud removal tool (preferred) or two flat-head screwdrivers, wire brush, Loctite 243 (blue, medium-strength threadlocker), torque wrench, IPA wipes

1. Remove the strut using the main procedure above — the trunk must be propped open independently
2. Position the ball stud removal tool around the stud base and rotate counterclockwise to unscrew from the sheet metal
3. No removal tool? Cross two flat-head screwdrivers at the base of the ball stud and lever against the surrounding sheet metal to rotate counterclockwise — works on 8 out of 10 studs; corroded studs may need penetrating oil (let soak 10 minutes)
4. Once removed, clean the threaded hole in the sheet metal with a wire brush — remove all rust, sealant residue, and debris
5. Apply 1-2 drops of Loctite 243 to the threads of the new ball stud (not the ball head)
6. Thread the new stud in by hand until finger-tight, then torque to 8-10 Nm — firm but not aggressive; overtightening can crack the sheet metal flange
7. Allow 20-30 minutes cure time before clipping the strut onto the new ball stud
8. Wipe the ball surface with a clean IPA cloth immediately before installing the strut clip — even fingerprint oils can prevent the clip from seating flush

Power Trunk Upgrade Kit Guide (Model 3)

The 2017-2020 Model 3 Standard Range and SR+ shipped with manual gas struts — no motor, no auto-open, no touchscreen control. If you're tired of manually lifting and closing your trunk, you can retrofit a full power trunk system in 60-90 minutes for $120-300.

How Retrofit Power Trunk Kits Work

Aftermarket power trunk kits include:

• Two motorized power struts (direct replacements for the OEM manual gas struts)
• A control module that connects to the vehicle's 12V system and trunk latch signal wire
• A pre-wired harness
• Optional: a kick sensor module (wave your foot under the rear bumper to trigger auto-open without touching the car)

The control module monitors the trunk latch release signal. When Tesla sends an "open" command — via touchscreen, key fob, or the exterior door button — the module powers the strut motors to push the trunk lid up automatically. Manual close is triggered by the stock Tesla trunk close button or the touchscreen; some kits add a dedicated button on the D-pillar.

Compatible Kits (2026)

Note: No compatible kits cover the 2024+ Model 3 Highland — the Highland ships with the power trunk as standard equipment, so no upgrade is needed.

Installation Overview (60-90 minutes)

1. Remove the existing manual struts using the simplified procedure: prop the trunk, release both ball stud clips (no electrical work needed — manual struts have no connector), remove struts
2. Mount the motorized struts into the same ball stud positions — the mounting geometry is identical
3. Route the wiring harness through the trunk body using the OEM wire grommet path — many kits include a grommet that occupies the same hole the factory would have used for a power trunk option
4. Connect the control module: 12V constant power via a fuse tap in the trunk fuse block, chassis ground to a body bolt, and the trunk latch signal wire (typically brown/white — confirm with your kit's wiring diagram)
5. Run the initial calibration cycle per the kit's instructions — usually 3 full open/close cycles; the module learns travel limits automatically
6. Set opening height via the kit's control button or the adjustment sequence in the instructions

After Installation

Once the kit is installed, auto-open works like a factory power trunk: the trunk pops up when you touch the button on the door handle, touchscreen, or key fob. Most kits do not integrate with the Tesla app's trunk control — the in-car touchscreen trunk button does work on kits that tap the latch signal directly.

Warranty note: Installing an aftermarket power trunk kit on an out-of-warranty Model 3 does not void other warranties under the Magnuson-Moss Warranty Act. On in-warranty vehicles, any damage directly caused by the kit would not be covered by Tesla — factor your remaining warranty period into the timing decision.

Also see: Tesla Door Latch Actuator Replacement for related latch mechanism work, and Tesla Trunk Wiring Harness Repair if you encounter wiring issues during installation.

Cost Comparison

Bottom line: DIY saves $150-300 over a service center visit and takes less than an hour including calibration.

Tesla Mobile Service vs. Independent Workshop vs. DIY: 2026 EU Cost

For readers in Lithuania, Latvia, Estonia, and wider Central Europe, the cost picture looks different from US pricing. Here's the actual 2026 breakdown:

Tesla Mobile Service in the EU: Tesla's mobile technicians carry a limited parts inventory per van. As of Q2 2026, Baltics-region wait times for trunk strut jobs via Mobile Service run 10–14 days. Call ahead to confirm your specific strut SKU is in stock — otherwise the visit becomes a "diagnostic appointment" and parts arrive separately at a second booking.

Independent EU workshops vs. Tesla pricing: For out-of-warranty vehicles, the quality of parts from a Tesla-specialist independent workshop is equivalent to OEM for trunk struts. The gas strut has no proprietary electronics — only the electrical connector and harness routing are Tesla-specific. Any strut with the correct Newton-force rating, extended length, and 14 mm ball socket end will perform identically to the part Tesla Service Center installs at twice the price.

When to use Tesla Service Center regardless of cost:

• Your vehicle is within the 4-year/80,000 km New Vehicle Limited Warranty — trunk strut premature failure before 3 years is covered at no cost
• You've already received a "Trunk motor failure" alert — motor replacement requires service tooling to reset motor controller memory
• The 2024+ Highland/Juniper throws persistent calibration errors after DIY replacement — on some software versions, the service-mode reset requires a Tesla diagnostic tablet

EU parts sourcing note: For OEM-equivalent struts in Lithuania and the Baltics, Amazon.de (tag: diyrepair-21) ships in 3–5 days with standard shipping. Tesloid.eu stocks OEM-equivalent struts for Model 3 and Y and ships EU-wide within 2–4 days. Direct from Tesla Parts (parts.tesla.com) typically takes 7–14 days to Lithuania, at 30–50% higher cost than aftermarket equivalents.

Tesla Cybertruck: Frunk Struts and Vault Cover

The Cybertruck uses fundamentally different trunk mechanisms from the rest of the Tesla lineup. Understand which system is failing before ordering parts or attempting any work.

Cybertruck Cargo Vault Cover — NOT a Strut System

The Cybertruck's bed cover (officially the "vault cover" or "tonneau cover") is an electrically motorized panel drive system — not a gas strut assembly. If your vault cover won't open or close, the failure is almost certainly one of the following:

The vault cover drive motor and tension cable are not DIY-serviceable on first-generation Cybertruck (2023–2026 production). Tesla Service Center visits are required for mechanical vault cover failures. A software-triggered "stuck vault" (most common symptom after OTA updates) is resolved via the service mode reset above.

Cybertruck Frunk (Front Trunk) Struts — DIY Serviceable

The Cybertruck frunk uses two passive gas spring lift supports on ball-stud clips — the same clip-off design as the Model S frunk and functionally identical to Model 3 non-power gas struts. No electrical connector, no calibration required.

Cybertruck Frunk Strut Replacement — Overview

The procedure is identical to the Model 3 manual gas strut replacement with one critical difference — the stainless steel exoskeleton:

1. Open frunk fully and prop with a solid prop rod (frunk lid is heavier than Model 3)
2. Release the lower ball-stud clip with a trim tool — wrap the tool tip or tape its edge before inserting against stainless panels. Unpainted stainless scratches permanently.
3. Release the upper ball-stud clip on the frunk lid
4. Remove strut, clean both ball studs with IPA wipes
5. Install new strut lower-first, verify both clips seat with an audible click
6. Test frunk open/close at least 5 times — no calibration step needed

Aftermarket sourcing (June 2026): TRQ, A-Premium, and Getfarway do not yet list Cybertruck frunk struts. Current options: OEM via Tesla Parts (parts.tesla.com, 7–14 day shipping), or a specialty gas spring supplier using the measurements above. Any universal gas spring with matching extended length (±15 mm), 10 mm shaft diameter, and 14 mm ball socket end will be functionally compatible.

Also see: Tesla Frunk Strut Replacement for the Model 3/Y/S frunk procedure that shares this technique.

Frequently Asked Questions

Why won't my Tesla trunk stay open? Worn gas struts (lift supports) are the most common cause. Over time, the nitrogen gas inside the strut leaks out and it can no longer hold the trunk or liftgate up. This typically happens after 3-5 years or 50,000+ miles. Cold climate owners tend to see this faster.

How much does it cost to replace Tesla trunk struts? DIY replacement costs $35-80 for a pair of aftermarket struts. Tesla Service Center charges $200-400+ for the same job, including labor. The struts are easy to replace yourself in about 20-45 minutes.

Can I upgrade my Tesla Model 3 trunk to power open? Yes. Aftermarket power trunk strut kits are available for the Model 3 that add automatic open/close functionality. They replace the manual gas struts and add a motor. Kits cost $150-300 and take 30-45 minutes to install.

What are the Tesla Model 3 and Model Y trunk strut part numbers? Model 3 power strut: LH 1551488-00-C, RH 1551489-00-C. Model Y liftgate strut: LH 1500601-00-A, RH 1500602-00-A. Always verify against your VIN at service.tesla.com — revision suffixes change with production updates.

Do I need to calibrate the trunk after replacing struts? For power trunk models: yes. Go to Controls > Service > Calibrate Liftgate or Calibrate Trunk on the touchscreen. This resets the motor's travel limits to match the new strut resistance. Skipping this can cause the trunk to stop partway or report faults.

How long do Tesla trunk struts last? OEM gas struts last 3-5 years depending on climate and usage frequency. Hot climates accelerate gas leakage. Cold climates temporarily reduce gas pressure, making early-stage failure feel worse in winter.

Will DIY trunk strut replacement void my Tesla warranty? Replacing trunk struts on a vehicle outside the body/trim warranty does not affect your battery or powertrain warranty. The Magnuson-Moss Warranty Act prevents manufacturers from voiding warranties for owner repairs unless the repair caused the specific failure being claimed.

What causes Tesla trunk struts to fail prematurely? Hot climates (Phoenix, Texas, Southern Europe) accelerate nitrogen leakage through shaft seals — struts last 2-3 years instead of 4-5. Leaving the trunk fully open for extended periods keeps the strut at maximum extension, stressing the seal. Harsh car washes that jet directly at the strut shaft also cut lifespan. In cold climates, gas pressure temporarily drops — a borderline strut feels completely dead at -10°C but partially functional at room temperature.

Can I still use my Tesla trunk while the struts are failing? Yes, but support the lid manually every time you open it. A weakening strut falls with increasing speed and force. A Model Y liftgate weighs 18-22 kg — it can cause head or neck injury if it drops unexpectedly. Do not leave children unattended near a trunk with failing struts. Replacement takes 30 minutes; delaying it is not worth the risk.

What is the difference between trunk struts and frunk struts on a Tesla? Rear trunk/liftgate struts are power struts with an integrated electric motor and higher gas force ratings due to the heavier panel. Frunk struts are passive gas springs with no motor and no electrical connector — replacement is simpler (15 minutes, no calibration). Part numbers, lengths, and force ratings are completely different. See the Tesla frunk strut replacement guide for the front hood procedure.

What force rating (N or lbs) should I choose for aftermarket Tesla trunk struts? Match or exceed OEM force ratings. Model 3 power struts use approximately 380N (85 lbs) gas component per strut. Model Y liftgate struts use approximately 490-500N (110-112 lbs) per strut — and Juniper owners should choose 110-120 lbs minimum since the 2024+ liftgate is heavier. Never go lighter than OEM spec. Listings that state compatibility without listing force ratings are typically undersized. Look for the force rating in the product specifications section, not just the listing title.

Do Tesla trunk ball studs need to be replaced when installing new struts? Not always, but check them every time. After removing the old strut, grab the clip end and rock it firmly — zero wobble means the stud is fine. Any perceptible play, flat spots, or corrosion on the ball surface means replace it before installing new struts. Ball studs cost $8-15 OEM and take 10 minutes to swap. Installing new struts on worn ball studs results in clicking noises and eventually the strut popping off its mount — it is false economy to skip the inspection.

Can I replace Tesla trunk struts without a prop rod? You should not attempt it alone without independent trunk support. The Model Y liftgate weighs 18-22 kg and will fall when strut gas pressure is lost during removal. A proper prop rod, a piece of 2x4 lumber cut to the trunk-open height, or a second person holding the liftgate are all acceptable options. Never rely on the old strut to hold the lid while disconnecting it — the moment the clip releases, the strut is no longer controlling the weight.

Can I replace Tesla Model X cargo liftgate struts myself? Yes, but it is the most involved Tesla strut job. The Model X cargo liftgate weighs 22–26 kg — you need a rigid prop rod and ideally a second helper. Headliner access requires releasing a wider strip than Model Y, and the electrical routing is longer. Allow 60–90 minutes for a first-time Model X job. Do not confuse the cargo liftgate struts with the falcon wing door actuators — the falcon wing system is a separate electromechanical component that requires service tools and should be handled by a Tesla technician.

How do I know if my Tesla needs new struts or a new trunk motor? Disconnect the power strut's electrical connector and try pushing the trunk open manually with your hand. If the trunk holds firmly when you apply upward force but won't stay up on its own, the motor is functional — only the gas spring component has failed (the normal failure pattern). If the trunk gives way even with your full hand pressure applied, either there is zero gas pressure remaining or the motor has a structural failure. A grinding noise during the last 20% of the opening arc, combined with slow travel, almost always indicates a dying gas strut rather than motor failure. Motors fail silently — no movement, no noise. Struts fail noisily — strain, slow travel, then sag.

Does the Tesla Cybertruck have trunk struts? The Cybertruck's cargo vault uses a motorized tonneau cover — not traditional gas struts. Vault problems are almost never a gas spring issue; they are motor controller, drive cable, or software faults that require Tesla Service for most mechanical repairs. The Cybertruck frunk does use two passive gas spring struts similar to Model S frunk struts. OEM part numbers are not publicly listed as of Q2 2026 — order via your VIN at parts.tesla.com. Frunk strut replacement takes 20–25 minutes using the same ball-stud clip technique as Model 3 and Y. No calibration is required since frunk struts are passive springs with no electrical connection.

How can I check Tesla trunk strut health when buying a used Tesla? Open the trunk fully and release immediately — a healthy trunk holds with zero droop for 60 seconds. Push firmly down on the open lid near the strut mount: healthy struts resist with firm, immediate pushback. During powered open, listen for a grinding or laboring motor sound in the last 20% of travel — this signals the motor compensating for failing gas pressure. Budget $40–90 for DIY replacement or negotiate $200–350 off the purchase price if struts show failure signs. Run the 5-minute force test from this guide before committing to a purchase.

Can extreme cold permanently damage Tesla trunk struts? Cold weather temporarily reduces gas pressure — at −20°C, struts feel 15–25% weaker than at +20°C. This is normal and reversible as temperature warms. However, water vapor trapped through a cracked shaft seal will freeze, expanding the damage and accelerating permanent failure. In cold climates: if struts feel dead in January but recover in April, they are borderline — replace before the next winter. If they remain weak at room temperature after warming up, the seal has failed and immediate replacement is needed. Baltic and Scandinavian owners should inspect struts every September as part of winter preparation — do it in a warm garage, not a January parking lot.

Common Mistakes That Cause Callbacks

These are the most frequent errors we see when customers bring their Tesla back after a DIY strut job:

1. Forgetting to run calibration. The single most common mistake. After replacing power struts on any Tesla, run Controls > Service > Calibrate Liftgate (or Trunk). Without calibration, the motor doesn't know the new strut's resistance profile — it may stop partway open, close too hard, or throw a "liftgate obstructed" fault. Takes 90 seconds and prevents hours of troubleshooting.

2. Installing only one strut. Replacing only the failing side is tempting to save money. The other strut has had the same wear exposure. Within 3-6 months the second strut fails, and you're back under the car. Always replace as a pair — a second strut costs $18-45 and takes 5 extra minutes.

3. Not cleaning ball studs before install. Grit and corrosion on ball studs prevents the retaining clip from seating fully. The strut works fine for 1-3 months, then pops off. Wipe both ball studs with an IPA cloth, confirm the ball surface is smooth and round, then install. The clip should snap on firmly with an audible click.

4. Disconnecting the harness with the ignition on. Not catastrophic, but it can log a fault code or confuse the power trunk controller. Turn off the vehicle (park, wait for the screen to go dark) before unplugging the strut connector.

5. Routing the grommet incorrectly on Model Y. When reinstalling the wiring grommet through the body panel, the grommet tab must face toward the vehicle interior or it won't seal. An unsealed grommet lets moisture into the body cavity, which eventually corrodes the connector and ball stud.

6. Buying struts not rated for 2024+ models. The Model Y Juniper and Model 3 Highland have revised geometry. Many Amazon listings still say "2020-2023" or "2017-2023." Confirm the listing explicitly covers 2024+ or your specific model year.

Real-World Tips From a Tesla Repair Shop

After replacing hundreds of trunk struts, here are things the official manual won't tell you:

Cold weather makes it worse. Gas struts lose pressure faster in cold climates. If your trunk barely stays open in winter but works fine in summer, the struts are borderline — they'll fully fail within a few months. Don't wait.

The ball studs wear out too. If you install new struts and they still feel loose or click, the ball studs on the body and trunk lid are probably worn. These are cheap to replace and often overlooked. Check them while you're in there.

Aftermarket struts vary wildly in quality. Cheap Amazon struts can fail within 6 months. The OTUAYAUTO and ARANA brands have been the most consistent in our experience. OEM is best if budget allows.

Power strut connector corrosion. On Model Y especially, the electrical connector behind the headliner can develop corrosion from moisture intrusion through the roof seal. If your new power struts aren't responding, clean the connector pins with contact cleaner before assuming the strut is defective.

Don't forget the trunk seal. While you have the trunk trim off, inspect the rubber trunk seal. A worn seal lets water in, which corrodes the strut mounting points and ball studs. Replace the seal if it's cracked or flattened.

EU Workshop Case Studies: Real Trunk Strut Failures

Here are five trunk strut repairs performed at our workshop in Kaunas, Lithuania. These represent the most instructive failure patterns we encounter. Details generalized for privacy.

Case 1 — 2021 Model Y Long Range, 47,000 km, Vilnius

Symptom: Liftgate opens 70% of the way and stops, then drifts down over 60 seconds. Owner first noticed the behavior in January at −12°C but assumed it was cold-related. By April at +15°C, the symptom persisted full-time.

Finding: RH power strut seal failure — oil residue visible on the shaft. LH strut gas pressure was down to approximately 60% of rated force. Both replaced as a pair with 490N-rated OEM-equivalent aftermarket struts. Calibration cycle required two attempts — the motor had already adapted its learned resistance profile to the weaker struts and needed a factory calibration reset before accepting the new profile.

Parts cost (EU): €58 for OEM-equivalent pair sourced via Amazon.de. Total job time: 35 minutes.

Case 2 — 2020 Model 3 Standard Range (manual struts), 81,000 km, Kaunas

Symptom: Trunk opens only if manually pushed. Zero lift assist.

Finding: Both gas springs completely depleted — no resistance remaining. Owner had been propping the trunk with his forearm for 8 months before coming in. One lower ball stud had a visible flat spot from the repeated metal-on-metal impact during opening cycles with zero strut support.

Action: Replaced manual gas struts with 380N-rated aftermarket units plus both lower ball studs (€9 each from Tesla Parts). Chose a higher-force aftermarket strut that pops the trunk open fully without manual push — the customer effectively got an auto-opening trunk without the power trunk motor.

Parts total: €42. Job time: 20 minutes.

Case 3 — 2022 Model Y Performance, 31,000 km, Riga (Latvia)

Symptom: "Liftgate obstructed" alert on touchscreen every 3–4 open cycles with no physical obstruction present.

Finding: Power strut connector behind the LH headliner had corrosion on pin 3 (motor signal line). The corroded connection caused intermittent signal dropout — the power trunk controller interpreted the missing signal as an obstruction event. The gas strut itself was intact at 31,000 km. The grommet had not been fully seated during a previous glass replacement by a non-Tesla shop — moisture had been entering from the roof seal area for months.

Action: Cleaned connector pins with CRC Contact Cleaner, applied Stabilant-22 contact enhancer, and sealed the grommet with silicone. No new struts required. Zero cost for parts; 45-minute diagnostic job. This is why we always inspect the grommet and connector before ordering struts — 15% of "bad strut" complaints at our shop are actually grommet/connector issues.

Case 4 — 2024 Model 3 Highland AWD, 16,000 km, Kaunas

Symptom: Trunk opens and holds correctly, but "Trunk position calibration required" alert persists after every soft reboot.

Finding: Both struts were healthy at 16,000 km. Root cause was firmware — a software update from 2024.48 to 2025.3 corrupted the calibration data stored in the trunk controller's EEPROM. The motor re-ran calibration on every startup but was not saving the result.

Action: Full service-mode reset of the trunk controller (hold brake pedal + move gear selector right twice, navigate to Trunk section, select "Factory Reset Calibration"). Ran calibration 3 times in service mode. Alert cleared. 3,000 km follow-up confirms no recurrence.

Takeaway: Software-related trunk alerts on post-2024 Highland models should be eliminated via service-mode calibration reset before assuming hardware failure. Do not replace struts on a 16,000 km Highland until you've exhausted the software diagnostic path.

Case 5 — 2020 Model S Long Range, 62,000 km, Vilnius

Symptom: Rear liftgate completely unresponsive — no movement, no motor sound.

Finding: Both power struts failed simultaneously after 3 years of outdoor winter parking. The motor had burned out compensating for dead gas pressure over approximately 6 months. The owner had noticed "slow trunk" behavior but continued using it daily — a textbook progression of the fault code scenario described above.

Parts required: OEM power struts (€180/pair) plus replacement motor (€290 OEM). Total parts: €470. Job time: 2 hours.

The math: Replacing struts at first sluggishness (€60, 35 minutes) vs. waiting for total motor failure (€470, 2 hours) is not a close call. This is the single most preventable expensive trunk repair we see.

Also see: Tesla Shock Absorber Replacement and Tesla Suspension Noise Fix for other suspension-related wear repairs that follow the same "fix early or pay much more later" pattern.

Model S Rear Trunk Strut Replacement (Raven & Plaid)

The Tesla Model S has a traditional sedan-style rear trunk lid — heavier than the Model 3's and with a different access path for the power strut connector.

Part numbers: Model S strut references are in the 1095xxx range for pre-2021 units; the 2021+ Plaid refresh changed mounting geometry. Always verify via parts.tesla.com with your VIN before ordering — the two generations are not interchangeable.

Model S Trunk Strut Replacement — Step-by-Step

Time: 30–50 min | Difficulty: 2.5 / 5 | Tools: Plastic trim tools, prop rod, IPA wipes

1. Remove trunk interior trim. The Model S trunk well is deeper than the Model 3 — the trim panel has 6–8 plastic retaining clips instead of 4–5. Start at the bottom edge and work upward with a plastic trim tool.
2. Access the connector. On pre-2021 Model S, the power strut connector routes through the driver-side (LH) D-pillar area — not directly through the trunk garnish. Partially releasing the D-pillar trim (2 clips at the base) gives you enough slack to disconnect the connector cleanly. Budget an extra 8–10 minutes for this step.
3. Push the rubber grommet through the body panel to gain slack on the harness.
4. Prop the trunk lid. The Model S trunk lid weighs 18–19 kg — use a solid, non-spring prop rod. Do not use a piece of lumber unless it is cut to exactly the right height.
5. Release upper then lower ball stud clips. Technique is identical to the Model 3 procedure above.
6. Remove the strut and inspect ball studs. The Model S trunk lid ball studs corrode faster than Model 3 due to the exposed rear deck position. Replace them if there is any wobble or pitting.
7. Install new struts lower-first, route the harness through the grommet, reconnect the D-pillar trim, reconnect the electrical connector.
8. Calibrate: Controls > Service > Calibrate Trunk. The Model S calibration cycle runs 3–4 full open/close cycles. Do not interrupt it.

Aftermarket note: As of 2026, A-Premium and TRQ both list Model S fitment for the Raven generation. For the 2021+ Plaid, aftermarket inventory is thin — OEM via Tesla Parts or a reputable Tesla salvage yard is the more reliable path. Mismatched force ratings on the Plaid's heavier trunk lid will produce the same slow-open symptom within days of installation.

Model X Cargo Liftgate Strut Replacement (Full Procedure)

What this covers: The rear cargo liftgate on Model X — the panel that opens over the cargo area behind row 3. This is separate from the falcon wing doors (rear passenger doors), which use electromechanical actuators, not struts.

Do not confuse these two systems. If your falcon wing door moves erratically, won't fully open, or clicks when closing — that is an actuator or limit switch issue, not a strut failure. The falcon wing actuators are high-voltage adjacent and require service tooling; this guide does not cover them.

Part numbers: Model X cargo liftgate struts have gone through at least three revision generations (2015–2019, 2020–2021, 2021+ Plaid). Confirm your year and VIN at parts.tesla.com before ordering anything.

Model X Cargo Liftgate Replacement — Step-by-Step

1. Open liftgate and rear doors. Open both rear passenger doors to gain access to the headliner edge along the full cargo opening width.
2. Access the headliner. The Model X requires releasing the rear headliner strip across the entire cargo opening — a wider area than the Model Y. Use an inflatable air wedge at 2–3 points across the width, and tape headliner edges with painter's tape to prevent scratches.
3. Disconnect the power strut connector. Two connectors run along this route on the Model X: the strut connector and the liftgate camera connector. They look similar — confirm you are disconnecting the strut connector (typically the one routed closer to the liftgate hinge). Leave the camera connector seated.
4. Prop the liftgate. 22–26 kg will fall hard. Use the most rigid prop available. Two helpers are strongly recommended for a first-time Model X job.
5. Release lower ball stud first, then upper. Control the strut — even a dead strut has residual gas tension on the compressed end.
6. Check the spoiler. The Model X cargo liftgate spoiler sits above the strut upper mount. It does not need to be removed, but it limits access — a 90° angled trim tool helps release the upper clip.
7. Install new struts. Clip upper first (same as Model Y order). Route the harness carefully — the longer harness path on the Model X makes it easy to leave slack that gets pinched by the liftgate on close.
8. Seal the grommet. The Model X body is prone to moisture intrusion at the liftgate body grommet, especially in Scandinavian and northern European climates. Inspect the existing grommet seal before reinstalling — replace it if cracked.
9. Calibrate. Controls > Service > Calibrate Liftgate. The Model X cycle takes 4–6 full open/close passes. After calibration, set liftgate height via Controls > Vehicle > Liftgate — the factory default assumes full open, which may hit a standard garage ceiling if you have a low door.

Do not use Model Y struts on Model X. The force ratings are different (Model Y: ~490–500N per strut; Model X cargo: ~580–625N per strut). Under-rated struts will not hold the heavier Model X liftgate and will fail to open fully within days of installation.

Fault Codes: What Your Tesla Touchscreen Shows

When trunk struts are failing, the Tesla touchscreen generates specific alert text. Knowing these helps confirm the diagnosis before spending money on parts.

Where to check:

• Tesla mobile app → Car → Controls → Alerts: shows all active warnings
• Touchscreen → Controls → Service → Trunk/Liftgate: shows last calibration date and open/close cycle count
• Service Mode (hold brake pedal + move gear selector to the right twice): shows raw diagnostic codes — useful for confirming strut vs motor failure before buying parts

Interpreting "Trunk motor failure": This alert appearing before you replace struts is the worst-case scenario. It means the motor spent weeks or months fighting dead gas pressure and overheated. The motor is a $180–400 part depending on model. This is why replacing struts at first sign of sluggish travel — not after the trunk completely fails to open — saves significant money.

2026 Firmware Updates Affecting Trunk Behavior

Software updates through late 2025 and early 2026 changed how Tesla's trunk controllers detect and respond to strut degradation. If you're diagnosing a trunk issue on a 2024+ vehicle, these changes affect what appears on the touchscreen.

2025.44 (Released December 2025) — Increased Torque Sensitivity

The 2025.44 update increased trunk motor torque sensing sensitivity by approximately 15% on Model Y Juniper and Model 3 Highland. Vehicles with borderline struts — 50–70% gas pressure remaining — began throwing "Liftgate obstructed" and "Trunk unable to open fully" alerts that were previously silent on earlier firmware.

Practical impact: If your 2024+ Juniper or Highland started throwing trunk alerts after the 2025.44 update, run the push-down force test above before assuming a physical obstruction. Numerous owners replaced latch components or spent hours checking for debris — the root cause was borderline struts that 2025.44 now correctly flags at an earlier degradation point.

2026.12 (Released March 2026) — Trunk Health Monitoring Panel

The 2026.12 update added a trunk/liftgate health monitoring panel on Juniper and Highland models under Controls > Service > Trunk Status. It displays:

• Cumulative open/close cycle count since last calibration
• Last calibration timestamp
• "Estimated strut health" indicator (Low / Normal / Good)

Important caveat: "Estimated strut health" is not a direct pressure measurement — it infers health from motor current draw trends over the last 50 cycles. It is intentionally conservative and will show "Low" before physical failure is noticeable. Use it as a replacement scheduling signal, not an emergency indicator.

Known Issue: 2026.6–2026.20 Calibration EEPROM Bug (Pre-2024 Model 3)

Multiple reports on Tesla Motor Club and r/teslamotors confirm that pre-2024 Model 3 vehicles running firmware 2026.6 through 2026.20 experience a "Trunk position calibration required" alert that returns after every soft reboot, even after successfully completing calibration via Controls > Service > Calibrate Trunk.

Fix procedure:

1. Enter service mode: hold brake pedal firmly + move gear selector to the right twice
2. Navigate to Trunk section → select Calibrate (not the standard touchscreen path)
3. Run calibration 3 times in sequence without rebooting between attempts
4. Exit service mode and test over 24 hours

If the alert persists after 3 service-mode calibrations, schedule a Tesla Service appointment — a small percentage of affected vehicles require a service-mode EEPROM flash. This is a software defect, not a hardware strut failure. Do not order replacement struts based on this alert alone without first performing the push-down force test.

Climate-Based Strut Replacement Timeline

Gas struts degrade at different rates depending on where you drive. Proactive inspection prevents the motor-burnout scenario above.

3-minute proactive inspection (do this at every tire rotation):

1. Open trunk fully, release immediately — healthy trunk holds with zero droop
2. Time the opening speed — any slowdown vs. new condition indicates pressure loss
3. Shine a light on the strut shaft — oil residue on the shaft means seal failure, weeks from total loss
4. Rock the ball stud clip end firmly — any wobble means ball stud replacement is overdue

Cold climate trap: Gas pressure drops 15–20% at −20°C compared to +20°C. A strut holding fine in summer will feel completely dead in a Lithuanian January. If your trunk struggles in winter but recovers in spring, the struts are borderline — replace them in September before temperatures drop, not in January when you are standing in a parking lot with frozen hands.

Related Guides

If you're working on your Tesla's trunk area, these related guides might be helpful:

• 🔧 Tesla Frunk Strut Replacement — same concept, front trunk
• 💧 Tesla Water Leak Fix — trunk seal and water ingress issues
• 🔒 Tesla Trunk Won't Close — latch and alignment problems
• 🔩 Tesla Trunk Latch Replacement — when the latch mechanism itself fails
• 🔌 Tesla Trunk Wiring Harness Repair — electrical faults in the trunk
• 🚪 Tesla Door Seal Maintenance — seal inspection while the trim is off
• 🚪 Tesla Door Latch Actuator Replacement — similar clip/connector work
• 💡 Tesla Tail Light Replacement — you're already back there
• 📐 Tesla Panel Gap Adjustment — trunk lid alignment after replacement
• 🔍 Tesla Used Buying & Inspection Guide — full pre-purchase checklist including trunk assessment
• 🛠️ Tesla Maintenance Schedule — what to check and when across all models
• 🔧 Tesla Shock Absorber Replacement — adjacent suspension work, similar difficulty
• 🔩 Tesla Suspension Noise Fix — diagnosing rattles and creaks in the same chassis area
• 🎯 Tesla Jack Points & Lifting Guide — if you need to access underside components during the same session

Final Thoughts

Trunk strut replacement is one of the most satisfying Tesla DIY repairs. The symptoms are annoying (nobody likes holding a trunk open with their head), the fix is cheap, and the difference is immediately noticeable. Whether you're restoring your trunk to factory behavior or upgrading your Model 3 with auto-opening struts, this is a 30-minute job that saves you a $300+ service center visit.

Just remember: always replace as a pair, clean the ball studs, run calibration afterward, and make sure those clips are fully seated. That's really all there is to it.