Parts for your 2005 Mazda Premacy-Centre bearing

2005 Mazda Premacy centre-bearing: is it actually used?

Short answer: on the vast majority of 2005 Mazda Premacy models seen in Australia and New Zealand (front‑wheel drive), a propshaft centre-bearing isn’t fitted or required. This isn’t guesswork. The Mazda Premacy/Mazda5 (CR series, launched 2005) workshop manual’s driveline/axle coverage for FWD models contains no propeller shaft assembly, and the Mazda electronic parts catalogue lists no centre support bearing for FWD CR3W variants. A centre support bearing only appears against the Japan‑market 4WD models (often coded CR4W) where a rear propeller shaft is used.

Why it’s not used on FWD Premacy: the 2005 Premacy drives only the front wheels via two front half‑shafts. There’s no long propeller shaft running down the tunnel to a rear differential, so there’s nothing that needs a centre support bearing. Instead, Mazda uses an intermediate (right‑hand) driveshaft with a bracket‑mounted support bearing on the engine block to keep half‑shaft lengths similar and reduce torque steer. That intermediate support bearing is sometimes casually called a “centre bearing”, but it’s a different part doing a different job on a much shorter shaft.

What about JDM 4WD imports? A handful of Japan‑new 2005 Premacy 4WDs made it into NZ as used imports. Those cars do have a propeller shaft to the rear diff, typically a two‑piece design with a rubber‑insulated centre support bearing. On those vehicles the centre-bearing helps control shaft whip, supports the shaft mid‑span, and keeps NVH in check. Mazda’s factory literature for the CR 4WD driveline shows the prop shaft assembly and calls up a serviceable centre support bearing with bracket and insulator.

If someone’s chasing a “centre-bearing” on a local FWD Premacy, they’re almost certainly after the front intermediate shaft support bearing instead. Typical symptoms of a tired intermediate bearing include a whirring or growl that changes with road speed, or slight vibration on throttle. Replacement involves removing the right half‑shaft and bracket, pressing the bearing off/on, and refitting with new circlips and seals as specified in the workshop manual. For 4WD imports, classic centre-bearing symptoms are shudder on take‑off, thumps over bumps, or a droning vibration, inspection focuses on the rubber insulator splitting and bearing roughness, and replacement should include marking shaft alignment to preserve balance and torquing support bracket and flange bolts to spec.

Technical sources referenced: Mazda Premacy/Mazda5 (CR) Workshop Manual, Driveline/Axle and Propeller Shaft sections, Mazda Electronic Parts Catalogue (CR3W FWD vs CR4W 4WD listings).

• FWD CR models (AU/NZ new): no propeller shaft, no centre-bearing.
• JDM CR 4WD imports: propeller shaft fitted with a centre support bearing.

Popular questions

Does a 2005 Mazda Premacy have a centre-bearing?
Most Aussie and Kiwi 2005 Premacy models are front‑wheel drive and don’t have a centre-bearing at all. If the vehicle is a Japan‑market 4WD import, it will have a rear propeller shaft with a centre support bearing.

What’s the “centre-bearing” people talk about on FWD Premacy models?
That’s usually the intermediate (right‑hand) driveshaft support bearing. It sits on a short shaft bolted to the engine block to help with half‑shaft geometry. It’s not a prop‑shaft centre-bearing, but it can make similar whirring/grinding noises when worn.

How can someone tell if their Premacy is the 4WD type that uses a centre-bearing?
Look under the car: a 4WD has a propeller shaft running down the tunnel to a rear differential and rear half‑shafts. The build plate/option codes and the Mazda EPC for the VIN will also show 4WD. No prop shaft or rear diff means FWD and no centre-bearing.