Model S/X: subframe bushings, clunk and hum over bumps

Summary

The subframe on Model S/X is attached to the body through four rubber-metal bushings (subframe bushings) and carries the rear suspension and drive unit. Over time the rubber loses oil, hardens and tears, and play appears between subframe and body → clunk/hum on larger bumps, rear-axle shift under load, "floaty" handling. On S/X past 150–200 thousand km this is routine work; sometimes replaced at lower mileage after impact loads.

Symptoms / Diagnosis

• Boom/clunk over speed bumps and seams, a "resonant" sound that transmits into the body.
• Hum/vibration during acceleration or on highway at 80–100 (rubber lost damping).
• Slight yaw of the rear axle under throttle and regen: the car "rotates" by small angles.
• On a lift you can see cracks and rubber separation around the subframe bushings.
• Sometimes camber "drift" that doesn't come out with normal alignment (subframe is physically displaced).
• Wheelspin/clunk under full throttle; on Performance/AWD Performance the bushings die first.

What to do

1) Diagnosis.

• Lift + pry bar/crowbar: try to shift the subframe by hand relative to the body. On a healthy one there is zero motion, on a bad one it is noticeable.
• Inspect all 4 attachment points: rubber tearing, sagging, oxidation around the bushing.
• Check the Rear Drive Unit bushings: they're separate but wear together with the subframe ones and are often replaced as a kit.

2) Repair options.

At a Tesla service, with a "bad bushing" they often replace the entire subframe, hence $1000+ bills, even though the rubber itself is pennies.

3) AliExpress lottery. Subframe bushings for S/X exist on AliExpress, but quality is a black box. For a heavy responsibility component, better Lemforder/Febest or polyurethane right away. Don't install unbranded: it'll tear within 20–30k, and you have to drop the subframe again.

Cost (Minsk shop prices)

Parts:

• One bushing (aftermarket equivalent): $30–60; Tesla doesn't sell it separately, subframe assembly only.
• Kit of 4 (subframe only): $120–200 aftermarket, $120–350 no-name polyurethane (eBay).
• Full kit of 6 (subframe + RDU): no-name polyurethane at the same $120–350; branded solutions are a different league (Unplugged Performance spherical kit for 2021+, $1695).
• Used subframe assembly from teardown: $300–700; new costs more and is almost pointless.

Labor (Minsk, ~$50/h):

• Drop/install rear subframe assembly with suspension: 6–10 h → ~$300–500.
• Press bushings: +1–2 h → ~$50–100.
• Alignment after: $40–70.

Total range:

• Basic (4 OEM bushings + pressing + alignment): ~$400–600.
• Full upgrade with additional washer/bolt replacement: up to ~$1000.
• With the Unplugged Performance spherical kit (2021+ only): ~$2100–2400.

In chat the question "how much to drop and reinstall the subframe" came up more than once; local masters did it. Labor is substantial, and around $300–500 for labor only is confirmed (#55733).

DIY notes

• Disconnect HV (via service connector per manual) and 12V.
• The subframe is lowered with a trolley/transmission jack; without it the job is dangerous.
• On S/X with air suspension, discharge the air system through the service menu before work.
• Check the mounting bolts: on S/X with 200k+ mileage they seize, sometimes shear off. Plan for a new fastener set in the budget.
• Pressing: heat the aluminum subframe with a heat gun before pressing in a new bushing, otherwise you can warp the seat.
• After everything, alignment is mandatory, with a printout (better yet, 3D rear-axle geometry measurement).
• If battery removal is planned, that's a separate serious job; do it only at a shop with experience.

Links / Sources

• Go-Parts, Model S/X Control Arm Guide (clunks, creaks): https://www.go-parts.com/garage/suspension-control-arm-tesla-model-s-tesla-model-x-2021-2026
• TMC, Model S Control Arms Bushing Kit: https://teslamotorsclub.com/tmc/threads/tesla-model-s-control-arms-bushing-kit.186852/
• Tesla Service Manual, Bushing Rear Drive Unit (Palladium): https://service.tesla.com/docs/ModelS/ServiceManual/Palladium/en-us/GUID-141E3CC1-4D18-4EFB-A752-B7B55B68F8FE.html
• Unplugged Performance, 6pc Bushing Upgrade Kit S/X: https://unpluggedperformance.com/product/2021-tesla-model-s-model-x-6pc-bushing-upgrade-kit/
• JeePerf, Model S/X Front Dream Suspension (6 bushings): https://www.jeeperf.com/product-page/tesla-model-s-full-front-dream-suspension-upgrade-6-bushings
• YouTube, '24 Tesla Model 3 RDU & Subframe bushing removal: https://www.youtube.com/watch?v=JNlG1-QpLSk

Community experience

From the TESLA owner's group BELARUS chat: the subframe-drop topic came up several times, predominantly on the Three, but on S/X the logic is the same.

Additional observations:

1. Rear subframe drop in Minsk is taken on by local masters; the work is rated as "substantial, but don't tackle without a lift" (#55733, #55765).
2. After light accidents the subframe is often repaired rather than replaced: sometimes a couple of arms is enough, but if the mounts are off it is a frame jig and/or replacement (#60438, #36390).
3. On pricing: a front subframe for M3 was found at $280 (Ukraine) against $650 (Belarus); on S/X the difference is even bigger, and used-from-teardown delivery saves real money (#11090).