Parts for your 2003 Lexus Is-Thrust bearing

2003 Lexus IS thrust-bearing — what’s fitted and what to service

Based on the Lexus IS (XE10) Factory Service Manual clutch section and the Toyota/Lexus Electronic Parts Catalogue, a thrust-type release bearing is fitted to 2003 Lexus IS models equipped with a manual gearbox (IS200 1G‑FE and markets that received the IS300 manual). Automatic-transmission cars don’t use a clutch thrust/release bearing because they run a torque converter. Separately, the 1G‑FE and 2JZ‑GE engines in these cars do incorporate crankshaft thrust bearings within the main bearing set, as outlined in the respective engine repair manuals, to control crank end float.

For manual models, the clutch thrust (release/throwout) bearing is a small but crucial bit of kit. Its job is to transfer the pedal effort, via the release fork, into smooth axial load on the clutch diaphragm spring so gears can be selected cleanly. When it’s healthy, pedal feel is light and linear, take-up is tidy, and there’s no racket from the bellhousing. When it’s tired, owners may notice a chirp or whirr at idle that changes when the clutch is pressed, notchier shifts, or vibration through the pedal. Left to howl, it can mark the pressure plate fingers and accelerate wear of related parts.

Because the gearbox has to come out to access it, best practice in Australia and New Zealand is to replace the thrust bearing whenever the clutch is being renewed, or any time the transmission is out for other work. A quality clutch kit typically includes a new release bearing, pairing it with a pilot bearing/bush, a check of the fork and pivot, and a light flywheel skim keeps everything sweet. A dab of the correct high-temp moly grease on the input shaft splines and the fork contact points helps avoid chatter. Don’t over-grease — it can fling onto the disc.

There’s no set service interval — it’s condition-based. Many IS owners see well over 150–200,000 km before attention is needed, depending on driving style. Avoid riding the clutch at lights, keep the pedal free play within spec, and get any noises investigated early. If the car is an automatic, none of the above applies to a clutch thrust bearing, focus instead on timely ATF service. Regardless of transmission, the engine’s internal crankshaft thrust bearings are not a routine service item, they’re addressed during engine rebuilds or if end float is out of spec.

• Tell-tales of a failing release bearing: noise that alters with clutch pedal movement, rough engagement, pedal vibration.
• Do this while you’re there: clutch kit, pilot bearing/bush, inspect fork/pivot, resurface flywheel, renew gearbox rear seal if weepy.

Popular questions

Does a 2003 Lexus IS automatic have a thrust-bearing?
For the clutch, no. Automatics use a torque converter, so there’s no clutch thrust/release bearing. The engine still has internal crankshaft thrust bearings, but they’re not a routine service item.

What are the signs the thrust (release) bearing is failing on a 2003 IS manual?
Common symptoms include a chirping or grinding noise that changes when the clutch pedal is pressed, a shuddery take-up, heavier or notchy shifting, and pedal vibration. If those crop up, it’s best to plan a clutch-out inspection and likely replace the bearing with a full clutch kit.

Should the thrust-bearing be replaced on its own or with the whole clutch?
Given the labour to remove the gearbox, most workshops in Aus/NZ recommend replacing the release bearing as part of a complete clutch kit, plus the pilot bearing/bush and a flywheel skim. It’s better value and reduces the chance of having to pull the box again soon after.