Parts for your 2002 Toyota Bb-Centre bearing

2002 Toyota bB centre-bearing: does it have one, and what to look for

For anyone hunting a “centre-bearing” for a 2002 Toyota bB (first‑gen NCP30/NCP31), here’s the straight talk: this model doesn’t use a propeller‑shaft centre support bearing. The bB is a front‑wheel‑drive layout with a transaxle and two front half‑shafts, so there’s no long tailshaft running down the middle of the car to support. That’s why a traditional centre-bearing isn’t fitted or catalogued for this vehicle.

Referencing technical sources, the Toyota Electronic Parts Catalogue (EPC) for NCP30/NCP31 lists no propeller shaft or centre support bearing, and the Toyota bB Repair Manual/Drivetrain sections (AX/DS) describe a FWD transaxle with LH/RH drive shafts only. Equivalent service information for the Scion xB (the export twin of the bB) shows the same FWD arrangement and no centre support bearing in the driveline.

Why isn’t a centre-bearing used on the 2002 bB? It comes down to the platform design and packaging:

• Front‑wheel‑drive transaxle means no rear differential and no tailshaft to support.
• No two‑piece shaft that would require a chassis‑mounted centre support.
• Less mass and complexity, which suits the bB’s compact, city‑friendly brief.

One point that can cause confusion: some small FWD Toyotas include a right‑hand intermediate (jack) shaft with a carrier bearing bolted to the engine block to help equalise shaft lengths and curb torque steer. That engine‑mounted carrier bearing, when fitted, is not the same part as a tailshaft centre-bearing, and it won’t be listed under propeller shaft components in the EPC. If a driver is chasing a vibration or a droning noise from the right‑hand side under load, it’s worth inspecting the RH driveshaft, the intermediate shaft assembly and its carrier bearing, along with CV joints and tyres, rather than looking for a non‑existent centre-bearing.

Bottom line: for a 2002 Toyota bB, a conventional centre-bearing isn’t applicable. If the goal is to fix a vibration or rumble, focus diagnosis on front driveline items (CV joints, intermediate shaft carrier bearing where fitted), engine and trans mounts, and wheel/tyre balance.

Popular questions

Does a 2002 Toyota bB have a centre-bearing?
No. Technical documentation (Toyota EPC and Repair Manual for NCP30/NCP31) shows a FWD transaxle with front half‑shafts only, so there’s no tailshaft or centre support bearing on this model.

What’s the difference between a centre-bearing and the bB’s intermediate shaft carrier bearing?
A centre-bearing supports a long two‑piece tailshaft in RWD/4WD vehicles. The bB’s optional carrier bearing supports a short right‑hand intermediate driveshaft that bolts to the engine block. They look different, mount in different places, and aren’t interchangeable.

How can someone tell if the intermediate shaft carrier bearing is worn on a bB?
Typical signs include vibration under acceleration, a humming/whirring from the right‑hand side, or visible play when the shaft is levered with the wheel off the ground. If the rubber insulator is torn or there’s roughness when the shaft is spun by hand, the bearing or complete intermediate shaft assembly may need replacement.