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. Ball Stud Replacement
19. Power Trunk Upgrade Kit Guide (Model 3)
20. Cost Comparison
21. Frequently Asked Questions
22. Common Mistakes That Cause Callbacks
23. Real-World Tips From a Tesla Repair Shop

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.

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.

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.

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.

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.

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

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.