Parts for your 2009 Toyota Bb-Thrust bearing

2009 Toyota bB thrust-bearing — is it used or relevant?

Short answer: a thrust-bearing (as in a clutch release/throw-out bearing) isn’t used on the 2009 Toyota bB. The 2009 bB (chassis codes QNC20/QNC21/QNC25) was supplied with an electronically controlled 4‑speed automatic transaxle (Super ECT) and a torque converter, not a manual gearbox with a friction clutch. Because there’s no clutch assembly, there’s no clutch release/thrust bearing to service or replace.

This call is backed by the factory docs. The Toyota New Car Features (NCF) for the QNC2# series and the Repair Manual chapters for Transaxle/Transmission describe a 4‑speed automatic only. The Toyota Electronic Parts Catalogue (EPC) listing for 2009 bB models shows no clutch release bearing group (Toyota release bearings typically sit under 31230—, which doesn’t appear for the QNC2# bB). Period bB brochures for the JDM market also list 4AT across the range.

Why it isn’t used comes down to how the drivetrain is built. The torque converter handles drive take‑up and decoupling at idle, so the car doesn’t need a manual clutch or a throw‑out (thrust) bearing to push on pressure‑plate fingers. Any axial (thrust) loads in the driveline are managed by internal bearings and thrust washers inside the automatic transaxle and the engine, and they’re not standalone service items in normal maintenance.

Owners chasing “thrust bearing noise” on a 2009 bB are usually hearing something else. Common culprits include:

• Torque converter shudder or automatic transaxle pump/planetary whine
• Auxiliary belt idler/tensioner bearings
• Wheel hub bearings or CV joints under load
• Engine mount vibration at idle with A/C on

What to do instead of looking for a clutch thrust bearing? Keep the auto trans healthy: use the correct Toyota‑spec ATF, check for clean shifts, and service fluid and filter on condition or at sensible intervals if the car tows or sees lots of stop‑start work. If there’s noise that varies with gear selection (P to D) or road speed, a proper diagnosis with line‑pressure checks and a stethoscope goes a long way.

Technical sources referenced:

• Toyota bB QNC2# New Car Features (NCF): powertrain overview states 4‑speed Super ECT automatic
• Toyota Repair Manual (RM) for QNC2# series: Automatic Transaxle sections only, no manual clutch service procedures
• Toyota Electronic Parts Catalogue (EPC) for 2009 bB QNC20/21/25: no 31230‑ (release bearing) group listed
• 2008–2010 JDM Toyota bB brochures: transmission specified as 4AT

Popular questions

Does a 2009 Toyota bB have a clutch thrust/release bearing?
No. The 2009 bB uses a 4‑speed automatic with a torque converter, so there’s no clutch or release (thrust) bearing to begin with. If there’s a noise that sounds like a clutch bearing, it’s best to check the torque converter, accessory pulleys, or wheel bearings instead.

What noises get mistaken for a thrust bearing on a 2009 bB?
A light whine in Park or Neutral that changes in Drive can be the trans pump. A rumble that follows road speed is often a wheel bearing. A chirp at idle is more likely a belt idler or tensioner. A trained ear and a quick on‑hoist check usually pin it down.

Is there any “thrust bearing” in the engine that needs servicing?
The engine has internal thrust washers/bearings for crankshaft end float, but they’re not a routine service item. They’re only inspected during engine overhaul. Regular oil changes with the correct spec oil are the best protection for those internal bearings.