Parts for your 2016 Toyota Bb-Thrust bearing

2016 Toyota bB thrust-bearing — is there one to service?

Short answer: a thrust-bearing isn’t a service item on the 2016 Toyota bB. On the 2016 bB (QNC2# series), Toyota specified a 4‑speed automatic transmission (U441E) rather than a manual gearbox. That means there’s no clutch release/thrust bearing to replace during routine servicing. Toyota’s Electronic Parts Catalog for QNC20/21/25 lists no clutch release bearing assembly for these models, and Toyota’s New Car Features material for the U441E describes a torque converter automatic with no manual clutch hardware.

Worth noting: the engine still has thrust surfaces (often called thrust bearings) that control crankshaft end float, but they’re integrated into the main bearing set inside the engine. Toyota engine repair manuals for the NZ‑series inline‑fours specify that crank end play is controlled at a main bearing journal, it’s an internal, non-routine item only checked during bottom‑end work or if there’s a suspected fault.

Why a thrust-bearing isn’t used here: the bB’s automatic uses a torque converter and planetary gearsets, so there’s no pressure plate, diaphragm spring or release mechanism. The “thrust-bearing” most people think of (the throwout/release bearing) only exists on manual-transmission cars.

What owners should do instead: focus on the servicing that actually keeps this bB happy. Use the correct automatic transmission fluid (Toyota ATF WS) and change it at sensible intervals based on local conditions and workshop advice. Keep engine oil changes on time, clean oil protects the main bearings and the thrust faces that live with them. If the engine is ever out for bottom‑end work, have the shop measure crankshaft end float and replace the flanged/thrust main bearing shells if it’s out of spec.

• When to investigate further: unusual axial movement of the crank pulley, recurring metallic rubbing noises at idle that change with accessory load, or confirmed out‑of‑spec end float during engine work.

Technical sources referenced for the above:

• Toyota Electronic Parts Catalog (Japan) for bB QNC20/21/25 (final model years) — drivetrain listings show U441E automatic, no clutch release bearing.
• Toyota New Car Features (U441E automatic) — torque‑converter automatic, no clutch release mechanism.
• Toyota Engine Repair Manual (NZ‑series inline‑four) — crankshaft end play controlled by thrust surfaces at a main bearing journal, service only during engine bottom‑end work.

FAQs

Does a 2016 Toyota bB have a clutch thrust/release bearing?
No. The 2016 bB is fitted with a U441E 4‑speed automatic, so there’s no manual clutch or release (thrust) bearing to service or replace. The parts catalogue for this model doesn’t list a release bearing assembly.

Is there any thrust-bearing in the 2016 bB at all?
Yes, but it’s internal. The engine controls crankshaft end float using thrust surfaces built into a main bearing. It isn’t a scheduled service item and is only inspected or replaced during engine bottom‑end work or if there’s a confirmed end‑float issue.

What maintenance helps avoid thrust-bearing issues on a 2016 bB?
Stick to regular engine oil changes and use the correct grade, and service the automatic with Toyota ATF WS at intervals suited to Aussie/Kiwi conditions. Good lubrication protects the main bearings and their thrust faces. If the engine is ever apart, ask the workshop to measure crank end float and renew the thrust/flanged main bearing shells if wear is detected.