Parts for your 2018 Lexus Is-Thrust bearing

2018 Lexus IS thrust-bearing: is it a thing?

Short answer: a clutch thrust/release bearing isn’t used on the 2018 Lexus IS. Technical sources including the Lexus IS Owner’s Manual and Australian/NZ specification sheets list only automatic and hybrid eCVT transmissions for this model year (8-speed automatic for the 2.0‑litre turbo IS 300 and 3.5‑litre IS 350, eCVT for the IS 300h). Toyota/Lexus Electronic Parts Catalogue entries for 2018 IS variants don’t list a manual clutch assembly or release (thrust) bearing, and Aisin automatic transmission documentation (AA80 series) confirms a torque converter is used instead of a manual clutch. That all means there’s no serviceable clutch thrust bearing on this car.

When people say “thrust bearing” in everyday workshop chat, they usually mean the clutch release (throwout) bearing found in a manual gearbox setup. The 2018 IS doesn’t run a manual, so there’s simply no place for that part. Instead, the drivetrain uses a torque converter (auto) or an eCVT transaxle (hybrid), neither of which requires a clutch release bearing.

Just to clear the air, there are other thrust-type bearings inside a 2018 IS, but they’re internal components, not regular service items:

• Engine crankshaft thrust bearing (controls end-float)
• Turbocharger thrust assembly on the 2.0‑litre 8AR‑FTS
• Automatic transmission internal thrust washers/bearings

If an owner is chasing a noise that sounds like a failing “thrust bearing”, it’s worth looking elsewhere. Common culprits include the serpentine belt idler or tensioner bearings, alternator or A/C compressor noises, or a torque converter shudder under light throttle. Proper diagnosis matters: check accessory drive components, ensure the correct engine oil and automatic transmission fluid are used at the recommended service intervals, and have a technician road test the car to differentiate driveline shudder from bearing noise.

Bottom line for servicing: there’s no clutch thrust/release bearing to replace on a 2018 Lexus IS. Keep up with scheduled engine oil changes, cooling system checks, and transmission fluid servicing per Lexus guidance, and have any driveline noise or vibration inspected by a technician familiar with the XE30-series IS. That approach avoids parts-swapping for a component the vehicle doesn’t actually have.

Popular questions about 2018 Lexus IS thrust-bearing

Does a 2018 Lexus IS have a clutch thrust (release) bearing?
No. All 2018 IS models in Australia and New Zealand were sold with either an automatic (8‑speed) or hybrid eCVT. With no manual gearbox or conventional clutch, there’s no clutch release/thrust bearing to service or replace.

What might sound like a bad thrust bearing on a 2018 IS?
Noises sometimes blamed on a “thrust bearing” are often accessory drive bearing issues (belt idler or tensioner), alternator whine, A/C compressor rumble, or a torque converter shudder. A quick check of the belt system, listening with the A/C on and off, and evaluating if the noise changes between idle, Neutral and Drive can point a technician in the right direction.

Are there thrust bearings elsewhere on the 2018 IS that need maintenance?
The engine’s crankshaft thrust bearing and the auto/eCVT’s internal thrust elements aren’t routine service items. The best protection is timely engine oil and transmission fluid changes using the correct Lexus-approved specifications. If symptoms of excessive crankshaft end-float or unusual transmission whine appear, professional diagnosis is recommended.