Parts for your 2014 Lexus Is-Engine mount

2014 Lexus IS engine mounts: what they do and when to replace them

Technical sources confirm the 2014 Lexus IS definitely uses engine mounts. Lexus/Toyota service information for the IS platform (GSE30/31/35 for IS250/IS350 and AVE30 for IS300h) in the Lexus IS Repair Manual and Toyota Technical Information System (TIS) specifies left- and right-hand engine mounting insulator assemblies, along with a rear transmission mount. The Lexus Electronic Parts Catalogue likewise lists these mounts across the 2014 IS range. That makes the engine-mount an essential, relevant component on this vehicle.

On this model, the mounts are designed to secure the engine to the subframe while soaking up vibration and engine movement. Most variants use hydraulic rubber “insulator” mounts that keep noise, vibration and harshness in check, so the cabin stays quiet and the driveline geometry remains true under load. Whether it’s the V6 IS250/IS350 or the hybrid IS300h, healthy mounts help throttle response feel crisp, prevent shudder on take-off, and protect exhaust, hoses and wiring from stress.

As part of routine servicing, a quick visual and functional check of the mounts pays off. Under the bonnet, look for collapsed rubber, tearing, perished edges, or fluid weeping from hydraulic mounts. With the car idling, excessive engine shake or a knock when selecting Drive/Reverse can hint at a failed mount. Oil or coolant leaks can shorten mount life, so any contamination should be cleaned and the source fixed before rechecking.

Typical symptoms owners notice include:

• Vibration at idle felt through the seats or steering
• Clunking on acceleration, braking or gear changes
• Visible engine movement or fan/shroud contact
• Fluid leaking from a hydraulic mount body

When replacement is due, it’s smart practice to fit quality OEM or equivalent mounts and consider doing left and right as a pair to keep NVH balanced. The transmission mount should be inspected at the same time. Correct installation matters: supports should be positioned properly, fasteners torqued to spec, and final tightening done at normal ride height to avoid pre-loading the rubber. After fitment, check clearances for the exhaust, steering, and under-bonnet components, and verify earth straps and hoses aren’t under tension.

There’s no fixed kilometre interval, but many workshops inspect mounts every service and plan replacement once wear signs appear or around higher-mileage marks. For hybrids, standard mechanical checks apply, with usual high-voltage safety procedures observed by trained technicians.

How long do engine mounts last on a 2014 Lexus IS?

Lifespan varies with driving conditions, heat, and fluid exposure. Many see 120,000–200,000 km, but mounts can age sooner if regularly exposed to oil leaks or harsh stop–start use. Regular inspections during servicing help catch early wear before vibration or knocks become obvious.

Can worn engine mounts damage other components?

Yes. Excess engine movement can stress exhaust flex joints, hoses, wiring and the transmission mount. It can also introduce driveline shunt and accelerate wear on ancillary brackets. Replacing tired mounts restores proper alignment and reduces the risk of knock-on repairs.

Should engine mounts be replaced in pairs?

Often, yes. Replacing left and right together keeps balance and NVH consistent, especially on vehicles with hydraulic mounts. At minimum, the opposite side and the transmission mount should be carefully inspected when one mount is changed.