Parts for your 2009 Lexus Is-Engine mount

2009 Lexus IS engine mount — what it does and when to replace it

Engine mounts are absolutely fitted to the 2009 Lexus IS range (IS 250, IS 350 and IS F). Technical sources including the Lexus Repair Manual for the 2009 IS (Engine/Hybrid System – Engine Mounting section) and the Toyota Electronic Parts Catalogue list the left and right “Insulator, Engine Mounting” and related brackets for these models. Many trims use hydraulic (fluid-filled) mounts to keep things smooth and quiet in the cabin.

On this Lexus, the engine mounts support the engine, line it up with the gearbox and driveshafts, and soak up vibration so it doesn’t buzz through the body. They also rein in engine movement under throttle, braking and cornering, which protects hoses, wiring and exhaust components. When they’re tired, drivers often feel a rougher idle, a clunk on take-off, or see the engine rocking too much under the bonnet.

There’s no fixed replacement interval in the factory schedule, but inspection during regular servicing is smart. A technician will look for split rubber, collapsed height, perished bushes or oily residue from a leaking hydraulic mount. If one side fails, it’s good practice to replace mounts in pairs to keep balance and NVH where Lexus intended.

• Common signs the mounts need attention:
  • Noticeable vibration at idle or when the A/C kicks in
  • Thump or knock on gear changes or when taking off
  • Visible cracks or fluid seepage from the mount body
  • Excessive engine movement when blipping the throttle

Replacement on the 2009 IS typically involves supporting the engine, removing the under covers, undoing the through-bolts and mount-to-subframe fasteners, then lifting the engine slightly to swap the insulators. Mounts should be installed in the correct orientation (heat shields and locating pins matter), and all fasteners torqued to the factory spec with the vehicle at normal ride height to avoid pre-loading the rubber. While in there, it pays to check the transmission mount and nearby hoses and exhaust clearances.

For longevity, avoid soaking the mounts with engine oil or coolant, keep the engine tuned and idling smoothly, and fix any misfires quickly—excess vibration shortens mount life. Quality matters here: genuine or reputable aftermarket hydraulic mounts will usually keep the Lexus calm and quiet for many more kilometres.

Popular questions about 2009 Lexus IS engine mounts

How long do engine mounts typically last on a 2009 Lexus IS?
In local conditions, many owners see 120,000–200,000 km before they notice NVH creeping in, but life varies with driving style, heat, and fluid leaks. City stop‑start and hard launches wear mounts faster than steady highway running.

What are the classic symptoms of a failing mount on this model?
A rougher idle you can feel through the seats or steering, a thunk when shifting from Reverse to Drive, and extra engine rock when you blip the throttle. If the mount is hydraulic, you might spot fluid weeping down the mount body.

What does replacement usually cost and how long does it take?
As a ballpark in AU/NZ, quality mounts are often $200–$500 each, with 1.5–3.0 hours labour depending on side and model (the IS F can be a bit tighter). Pricing swings with brand choice and workshop rates, so a written quote is best.