Parts for your 2019 Lexus Is-Engine mount

2019 Lexus IS engine-mount: purpose, maintenance and when to replace

Engine mounts are absolutely fitted to the 2019 Lexus IS. Lexus technical sources, including the IS (2017–2020) Repair Manual and the Lexus Electronic Parts Catalogue, specify left and right hydraulic engine mounting insulators and a rear transmission mount on these models. On the 2.0‑litre turbo (8AR‑FTS) and the 3.5‑litre V6 (2GR‑FKS), the mounts manage engine movement and isolate vibration from the cabin, keeping the drive-line aligned under load.

In everyday driving, the mounts do a quiet but crucial job. They secure the engine to the subframe while soaking up vibration at idle and during acceleration. Under hard throttle or during sharp gear changes, they resist torque reaction so the engine doesn’t rock about, protecting exhaust flex joints, hoses and wiring. Because the 2019 IS is rear‑wheel drive in local markets, correct mount stiffness also helps maintain smooth take‑offs and tidy shift quality.

There’s no fixed replacement interval in the factory schedule, but mounts are wear items. Hydraulic mounts can seep or collapse over time, especially with heat and age. During routine servicing, a visual check under the bonnet and on a hoist is smart practice—look for perished rubber, fluid staining on hydraulic mounts, or excessive engine movement when blipping the throttle in gear (with the brakes firmly held).

• Common signs of worn mounts:
  • Extra vibration through the steering wheel or seats at idle
  • A thud or clunk on take‑off, gear changes, or when shifting from Drive to Reverse
  • Noticeable engine movement or fans/shrouds touching under load
  • Visible cracks, separated rubber, or fluid leaks at the mount

When replacement’s due, many techs prefer doing left and right mounts as a pair to keep NVH balanced, and inspecting the rear transmission mount at the same time. Support the engine with a jack and a proper block—never jack on the sump—then torque fasteners to spec with the drivetrain correctly supported. Genuine Lexus mounts preserve the original refinement, quality aftermarket options can be fine, but overly stiff “performance” mounts may add cabin buzz. With normal use, mounts often last well past 100,000 km, but city heat cycles and spirited driving can bring that forward.

Popular questions

How long do engine mounts last on a 2019 Lexus IS?
Most owners see well over 100,000 km before any concern, but life varies with heat, driving style and road conditions. If there’s fresh vibration at idle or a clunk on take‑off, get them checked rather than waiting for a set kilometre figure.

Can worn engine mounts damage other parts?
Yes. Excess movement can stress exhaust flex joints, hoses and wiring, and it can worsen NVH. Left long enough, you might also feel harsher shifts as the drivetrain twists under load.

Should both engine mounts be replaced together?
It’s often recommended. Replacing mounts in pairs helps keep the car’s balance and refinement consistent, and avoids chasing lingering vibration from an ageing mate on the other side.