Parts for your 2005 Toyota Bb-Centre bearing

2005 Toyota bB centre bearing: is it even a thing on this model?

For most 2005 Toyota bB models, a centre bearing isn’t used or relevant. The bB of this era runs a transverse front-wheel-drive (FWD) layout, so there’s no long propeller shaft running down the car that would need a centre support bearing. This is backed by technical references: the Toyota Electronic Parts Catalog (EPC) lists no propeller shaft or centre support bearing for the FWD NCP30/NCP31 bB, while the 4WD variant (chassis code NCP35) does list a propeller shaft and a centre support bearing under the propeller shaft group (PNC 37230). Toyota’s New Car Features documentation for the NCP30 series also describes the FWD transaxle layout with only short front drive shafts, and the platform-twin Scion xB (NCP31) workshop manual shows no prop shaft in its drivetrain section.

Why isn’t a centre bearing used on a 2005 bB? Simple: the FWD setup doesn’t need a long, two-piece tailshaft. Power goes from the transaxle straight to the front wheels via CV shafts, so there’s no mid-ship shaft to support. That means no centre bearing to service, replace, or worry about. It keeps weight down, frees up underbody space, and reduces cost and complexity—handy for a compact city car.

There is an exception: some Japan-market bB models were sold with 4WD (NCP35). Those cars use a propeller shaft to the rear, typically a two-piece design with a rubber-mounted centre support bearing. In Aotearoa New Zealand and Australia, most used-import bB examples are FWD, and 4WD versions are relatively uncommon. If yours is 4WD, then yes, a centre bearing becomes part of routine driveline checks.

Not sure which you’ve got? These quick checks help:

• Look for the chassis code on the build/compliance plate or rego details: NCP30/31 is FWD, NCP35 is 4WD.
• Peek underneath: a 4WD bB will have a propeller shaft running to the rear diff with a rubber-mounted bearing roughly mid-way.
• Give your parts supplier the VIN/chassis code and ask if a prop shaft centre support is listed.

If a 4WD bB shows driveline shudder on take-off, a droning that rises with road speed, or a clunk on throttle changes, the centre support bearing could be in play. A workshop can confirm by checking the prop shaft support and rubber isolator for play or cracking.

FAQs

Does a 2005 Toyota bB have a centre bearing?
Most don’t. The common FWD bB (NCP30/NCP31) has no propeller shaft, so there’s no centre support bearing to service. Only the 4WD NCP35 variant uses a prop shaft and a centre bearing, as shown in Toyota’s EPC listings.

How can someone tell if their bB is 4WD and has a centre bearing?
Check the chassis code: NCP35 indicates 4WD. You can also look underneath for a propeller shaft running to a rear differential with a rubber-mounted bearing about halfway along. Your VIN or chassis code given to a dealer/parts store will also confirm it.

What symptoms suggest a centre bearing issue on a 4WD bB?
Expect driveline vibration or shudder on launch, a humming/whirring that scales with speed, or a clunk on acceleration and lift-off. A technician will inspect the bearing for excess play, torn rubber, and misalignment, and evaluate the prop shaft joints at the same time.