Parts for your 2006 Lexus Is-Engine mount

2006 Lexus IS engine mount: what it does and when to replace it

Engine mounts are absolutely used on the 2006 Lexus IS. Toyota’s official service information (TIS) for the 2006 Lexus IS 250/IS 350 (chassis GSE20/21/22, USE20) details “engine mounting insulators” on both sides of the engine, plus a front roll stopper, and provides removal/installation steps in the Engine Mechanical section. The Toyota Electronic Parts Catalogue likewise lists left and right hydraulic engine mounts for these models. These technical sources confirm the part is fitted and serviceable on the vehicle.

On a 2006 Lexus IS, the engine mounts’ main job is to hold the V6 (or diesel on IS220d markets) securely while soaking up vibration. They’re typically hydraulic (fluid-filled) to cut harshness, so the cabin stays calm at idle and the drivetrain feels tight when taking off or shifting. They also keep the exhaust, radiator hoses and ancillaries aligned by limiting excessive engine rock.

There’s no fixed replacement interval, because mounts age with kilometres, heat and driving style. Many last 120,000–200,000 km, but earlier failure isn’t unusual in hot, stop–start city use. During routine servicing, a quick look for collapsed rubber, leaking hydraulic fluid, or metal-to-metal contact pays off. If one side is shot, replacing mounts in pairs keeps balance and NVH where Lexus intended.

• Common signs of tired mounts:
  • Noticeable vibration through the steering wheel or seats at idle
  • Thumps or clunks on acceleration, braking or gear changes
  • Excessive engine movement when blipping the throttle in neutral
  • New exhaust or hose contact noises after bumps
• Service and replacement tips:
  • Support the engine from below with a block on the jack, never lift on the sump alone
  • Loosen and torque fasteners with the engine at normal ride height to avoid pre-loading the rubber
  • Use OEM-quality hydraulic mounts, solid or “race” types add vibration
  • Check the transmission mount and front roll stopper at the same time
  • After replacement, verify idle quality and clearances around exhaust and cooling hoses

Owners of diesel IS220d models should note the mount tuning differs from the petrol V6, as noted in factory documentation, due to the diesel’s unique vibration profile—fit parts that match the exact engine code. With the right mounts in good nick, the 2006 IS keeps that trademark Lexus smoothness on Aussie and Kiwi roads.

Popular questions about 2006 Lexus IS engine mounts

How long do engine mounts typically last on a 2006 Lexus IS?
Most owners can expect 120,000–200,000 km, but heat, frequent short trips, and aggressive launches can shorten that. Regular inspections during scheduled services help catch leaks or sagging before they cause extra vibration or component contact.

What are the most common symptoms of a failing engine mount on this model?
Tell-tales include a shaky idle, a dull thud when selecting Drive or Reverse, more drivetrain shunt on and off the throttle, and occasional exhaust rattles. Visual leaks from a hydraulic mount or a mount sitting noticeably lower on one side are classic clues.

Should engine mounts be replaced in pairs on the IS?
It’s best practice to replace left and right engine mounts together. Doing both keeps the engine sitting square and maintains factory NVH levels. At the same time, check the transmission mount and the front roll stopper so the whole system works as intended.