Parts for your 2004 Mazda Premacy-Centre bearing

2004 Mazda Premacy centre bearing — is it even a thing?

For the Australian and New Zealand–delivered 2004 Mazda Premacy (CP series), a tailshaft centre bearing isn’t fitted or required. This conclusion is supported by Mazda’s CP (1999–2004) Workshop Manual for Driveline/Axle, which shows a front‑wheel‑drive transaxle with no propeller shaft, and by Mazda Electronic Parts Catalogue listings for AU/NZ Premacy models that don’t include a prop shaft or centre support bearing assembly. Only certain Japan‑domestic 4WD Premacy variants of the same era show a two‑piece propeller shaft with a centre support bearing in the JDM parts listings.

Why no centre bearing on the local 2004 Premacy? It’s a front‑wheel‑drive people mover, so drive is sent to the front wheels via short driveshafts with CV joints straight from the transaxle. There’s no long tailshaft running to a rear differential, which is the setup that needs a centre support bearing. That FWD layout keeps weight and complexity down, reduces NVH (noise, vibration, harshness), and cuts service costs—there’s simply no centre bearing there to maintain.

Worth noting: the FWD Premacy does use a right‑hand intermediate (stub) shaft with a support bearing to balance driveshaft lengths. Some workshops casually call that a “centre bearing”, but it’s not the same thing as a tailshaft centre support bearing. If owners are chasing a mid‑car vibration or hum thinking it’s a centre bearing, on these FWD models it’s more likely tyre cupping, a front wheel bearing, a worn CV joint, or an engine/trans mount. If the intermediate shaft support bearing is tired, symptoms usually show up as a drivetrain rumble under load that changes with throttle rather than road speed, replacement involves removing the RH intermediate shaft and pressing the bearing off/on—always use quality parts and follow Workshop Manual procedures for seals, circlips and torque settings.

• Technical sources referenced: Mazda Premacy (CP, 1999–2004) Workshop Manual – Driveline/Axle, Mazda Electronic Parts Catalogue (AU/NZ and JDM) for CP Premacy driveline assemblies.
• If the vehicle is a rare JDM 4WD import, it may have a propeller shaft with a centre support bearing—confirm by VIN or a quick look underneath for a rear diff and tailshaft.

FAQs

Does a 2004 Mazda Premacy have a centre bearing?
On Australian and New Zealand FWD models, no. There’s no tailshaft, so no tailshaft centre support bearing. Some Japan‑import 4WD Premacy variants do have a propeller shaft with a centre support bearing.

How can someone tell if their Premacy is 4WD and has a centre bearing?
Look underneath for a rear differential and a prop shaft running down the tunnel. A 4WD badge, specific VIN option codes, or JDM build plates are further clues. If those are present, a centre support bearing is likely fitted.

What causes a mid‑car hum or vibration if it’s not a centre bearing?
Common culprits are cupped tyres, a front wheel bearing, worn CV joints, unbalanced wheels, or tired engine/trans mounts. Start with a tyre rotation/balance and a wheel‑bearing check, then inspect the CVs and mounts. On FWD Premacy, the RH intermediate shaft support bearing can also wear, but it’s different from a tailshaft centre bearing.