Parts for your 2017 Lexus Is-Engine mount

2017 Lexus IS engine mount — what it does and when to replace it

Engine mounts are absolutely fitted to the 2017 Lexus IS range. Lexus service literature for the XE30-series (2017 model year) includes a dedicated “Engine Mounting” section outlining inspection and replacement procedures, and the Toyota/Lexus Electronic Parts Catalogue lists right- and left-hand “Insulator, Engine Mounting” for the 8AR‑FTS (IS 200t/IS 300), 2GR‑FKS V6 (IS 350) and the hybrid’s petrol engine. These references make it clear the car uses liquid-filled engine mounts paired with a separate transmission mount to control engine movement and cabin refinement.

For this model, the engine mount’s job is to hold the engine steady while soaking up vibration so the cabin stays quiet and comfy. The Lexus setup uses hydraulic (liquid-filled) insulators that smooth out the buzz you’d otherwise feel through the steering wheel and seats, especially at idle. They also rein in engine rock on take-off and during hard shifts, which keeps driveline components happier and reduces that thump under the bonnet.

There’s no fixed service interval for mounts, but on a 2017 car they’re well worth a look during scheduled servicing—particularly around the 100,000–150,000 km mark, or sooner if the car regularly tows, drives on rough roads, or lives in stop‑start traffic. The hybrid’s frequent engine restarts and the turbo model’s extra torque can both add to mount workload, so inspection’s a smart move.

• Common signs it’s time for new mounts:
  • More vibration at idle or with the air‑con on
  • Clunks or a shudder on take‑off or when shifting
  • Visible sagging or cracked rubber
  • Oily residue from a leaking hydraulic mount

Replacement is straightforward workshop work but does require supporting the engine safely, so most owners will leave it to a qualified mechanic. The process typically involves supporting the sump with a pad, unbolting the mount and bracket, swapping the insulator, and torquing everything to spec. Genuine Lexus or high‑quality aftermarket hydraulic mounts will maintain that factory NVH polish, mixing solid or “race” mounts can make the cabin noticeably harsher.

Good practice during servicing includes a visual check under the bonnet for collapsed rubbers or leaks, confirming fastener torque, and assessing idle quality with the vehicle in Drive and the air‑con cycling. If one side has failed, the opposite side and the transmission mount should be assessed as a set to keep engine alignment spot on. Done right, fresh mounts can make a 2017 IS feel years younger—less buzz, cleaner shifts, and a quieter ride down the motorway.

Popular questions about 2017 Lexus IS engine mounts

How long do the engine mounts usually last on a 2017 Lexus IS?

In local conditions, many last well past 100,000 km, but lifespan varies with driving style and roads. Vehicles that see lots of urban stop‑start, quick launches, or rough surfaces can need mounts earlier. Regular inspections during scheduled servicing help catch wear before it affects comfort.

Can worn engine mounts damage other components?

Yes. Excessive engine movement can stress exhaust flex joints, hoses, and wiring, and may contribute to driveline thumps that accelerate wear in transmission and diff mounts. Replacing tired mounts restores alignment and reduces shock loads through the driveline.

Should both engine mounts be replaced at the same time?

Often recommended. If one hydraulic insulator has failed or sagged, its mate is usually not far behind. Replacing them as a pair, and checking the transmission mount, keeps the engine sitting correctly and minimises the chance of chasing residual vibration.