Tesla S/X/3/Y: strut top mounts — signs of failure and replacement

Summary

The strut top mount is a rubber-metal assembly at the top attachment point of the strut to the body, plus a support bearing (on the front axle). As the rubber wears, the mount sags and the bearing dries out: squeaks appear when turning the wheel at standstill / low speed and a dull clunk over potholes. The topic is relevant for all Teslas, but on 3/Y it's a cheap replacement, while on S/X with air it's often easier to replace the strut as an assembly.

Symptoms / diagnosis

• Squeak when turning the wheel at standstill or low speed (especially in the cold / after a wash).
• Dull clunk over big bumps and speed bumps, as if something "settles" at the top of the strut.
• When rocking the body (push-release the hood), odd noise around the mount, sometimes a click.
• One corner sagging relative to the others (on air it's masked by the compressor).
• On the front axle the steering feel sometimes changes: stickiness, uneven effort.

Easy to confuse with: front upper control arm (FUCA, ball joint squeak), sway bar end links (metallic rattle), boot/bump stop.

What to do

1. Diagnostics. Remove the upper boot or hood cowl, inspect the mount for rubber cracks and weeping. Rock the body and listen near the upper hat. On the front axle, turn the wheel on a lifted car: a squeak or crunch in the support bearing is heard right away.

2. Platform differences.

• Model 3 / Y, front: standard coil-over strut. Tesla has no separate PN for the mount: the front damper is sold only as an assembly (Spring & Damper Assembly); a separate mount + bearing is aftermarket only (febi, SWAG, Sachs, Monroe) and replaces for reasonable money.
• Model 3 / Y, rear: struts and springs separate, the upper damper mount is a simple rubber unit.
• Model S / X (coil suspension, RWD/AWD non-air): construction close to 3/Y, but physically larger. Mount replacement is straightforward with a spring compressor.
• Model S / X with air suspension: on early (2012–March 2016) and facelift (2016+), damper and air spring come as an assembly. The mount is not sold separately as a rebuild kit, so it's usually replaced as a strut assembly (Tesla OEM 1027361-00-X etc.) or Arnott, Bilstein as replacement. Repairing the air spring/mount separately is not pleasant.

1. Replacement options.

• Tesla OEM: available, but not cheap; on S/X air it's the main path.
• Arnott: the most popular alternative for S/X air, used by every repair shop.
• Bilstein, KYB, Sachs: coil strut replacements on 3/Y and S/X non-air; compatible mounts available.
• Polyurethane / tuning (Unplugged Performance, MPP): for those who don't fear comfort loss.
• AliExpress: on 3/Y, upper mounts actually last (CTR, RBI, Febest brands), but on S/X air don't go there.

Belarus budget

Parts (per pair, axle):

• M3/Y, upper mount + bearing, aftermarket: $40–90 pair.
• M3/Y, OEM or Sachs/Bilstein: $80–160 pair.
• S/X (non-air), mounts: $70–140 pair.
• S/X with air: a new Arnott strut assembly ~$650–800 each, a rebuilt OEM strut from ~$400–450, new OEM $700–1000 each.

Labor (Minsk, ~$50/h):

• M3/Y, front mount + strut rebuild, pair: 2.0–3.0 h → ~$100–150.
• M3/Y, rear mount, pair: 1.0–1.5 h → ~$50–75.
• S/X coil, mount, pair: 2.5–3.5 h → ~$125–175.
• S/X with air, strut assembly replacement: 1.5–2.5 h/side → ~$75–125 per side, plus often air system calibration in Service Mode.

Total range:

• M3/Y, front assembled: ~$140–310.
• S/X coil: ~$200–315.
• S/X air, both front struts as assemblies with labor and calibration: ~$1000–1200.

DIY notes

• Disconnect 12V before any work in the engine bay.
• On M3/Y front struts a spring compressor is required.
• Don't mix sides of S/X mounts: left/right differ.
• On air, release pressure via the service menu before removal.
• After front mount replacement, alignment is mandatory.
• On S/X with air, after strut replacement, height sensor calibration in Service Mode (via Toolbox or Toolbox 3 at specialists).
• Often a squeaking "mount" when pressing/releasing the gas pedal is a loose strut rod nut, not the rubber pillow. Check that first before buying mounts (see chat below).

Links / sources

• MPP, diagnosing suspension noises: https://www.mountainpassperformance.com/diagnosing-suspension-noises-on-the-tesla-model-3-model-y/
• Tesla Service Manual, Damper Assembly Front (Model Y): https://service.tesla.com/docs/ModelY/ServiceManual/en-us/GUID-CB1ABF30-5F19-4066-B070-DD98EF22517E.html
• Go-Parts, Model S Air Strut: clunks, leaks, ride height: https://www.go-parts.com/garage/suspension-strut-tesla-model-s-2021-2025
• TMC, Shocks/Struts thread: https://teslamotorsclub.com/tmc/threads/shocks-struts.301339/
• YouTube, Model Y Front Strut Top Mount Removal: https://www.youtube.com/watch?v=rYRlEAlaAZc
• Unplugged Performance, Model S PnP shocks installation: https://unpluggedperformance.com/installation-documents/model-s-pnp-shocks-installation-guide/
• Autodoc, aftermarket strut mounts for Model 3/Y: https://www.autodoc.parts/car-parts/strut-mount-and-bearing-10471/tesla/model-3

Community experience

From the TESLA owner's group BELARUS chat: top mounts are often a "diagnosis of exclusion" when the end links have already been replaced and the knock/squeak remains.

Additional observations:

1. A loose strut rod nut mimics a top mount squeak. Squeaks on press/release of the gas pedal are the first thing to check (#260508).
2. Owners chasing knock symptoms "not found at 4 shops" go as far as replacing struts, sway bar mounts and the strut top mount (#341954); sometimes the culprit is in the brake brackets, and the mounts were replaced "along the way".
3. Support bearings are often confused with sway bar end links, since the symptoms are similar. Check both at once (#194554).