Parts for your 2010 Toyota Bb-Centre bearing

2010 Toyota bB centre-bearing: what’s fitted and what’s not

For the 2010 Toyota bB, the typical front-wheel-drive variants (frame codes QNC20 and QNC21) do not use a centre-bearing. Technical references that back this up include the Toyota Electronic Parts Catalogue (EPC) for QNC2# models, which lists no propeller shaft or centre support bearing for 2WD, the Toyota bB Repair Manual (Drivetrain/Axle), which details only front drive shafts and CV joints for 2WD, and Toyota/Daihatsu New Car Features documentation for the bB/M4# platform, which describes a transverse engine, front transaxle layout. A centre-bearing is a support for a two-piece propeller shaft, and that hardware simply isn’t present on 2WD bB models.

Worth noting for completeness: a 4WD bB does exist (frame code QNC25, Japan domestic market). That configuration adds a propeller shaft to the rear differential and may use a centre support. However, most 2010 bB vehicles in Australia and New Zealand are 2WD imports, where a centre-bearing is not relevant.

Why isn’t a centre-bearing used on the 2WD 2010 bB? It’s down to the drivetrain design. The bB drives the front wheels via short left and right halfshafts with CV joints, so there’s no long propeller shaft running down the car that would need a mid-point support. This front-drive layout, confirmed in the factory service literature noted above, keeps the underbody simpler, lighter, and cheaper to service, with fewer rotating parts to maintain.

• No prop shaft in 2WD bB, so nothing for a centre-bearing to support.
• Front halfshafts and CV joints handle power delivery, these are the items to service and inspect instead.
• Common vibration culprits on a 2WD bB are tyre/wheel balance, worn CV joints or boots, wheel bearings, bent wheels, and tired engine or trans mounts.

If a workshop mentions a “centre-bearing” on a 2WD bB, they’re likely thinking of rear- or all-wheel-drive setups, or using a loose term for front driveline components. When in doubt, check the frame code on the build plate and confirm parts against the Toyota EPC.

Popular questions

Does a 2010 Toyota bB have a centre-bearing?
For the common 2WD models (QNC20/QNC21), no. The factory parts catalogue and repair manual show no propeller shaft or centre support bearing. Only the 4WD QNC25 variant has a prop shaft, and that’s the scenario where a centre-bearing may be used.

What should be checked if there’s a vibration that someone blames on a “centre-bearing”?
On a 2WD bB, look at the real suspects: tyre/wheel balance and condition, front CV joints and boots, front wheel bearings, engine and transmission mounts, and alignment. These are the usual sources of shakes on this platform.

How can someone tell if their bB is 4WD and might have a centre-bearing?
Check the frame code (QNC25 indicates 4WD). A quick look underneath will also show a rear differential and a propeller shaft if it’s 4WD. If those aren’t present, it’s a 2WD model and there’s no centre-bearing to replace.