Parts for your 2012 Mazda Premacy-Centre bearing

2012 Mazda Premacy centre-bearing — is it even a thing?

Short answer: a centre-bearing isn’t used on the 2012 Mazda Premacy (also known as the Mazda5, CW series). Technical sources make this clear: the Mazda Workshop Manual for the CW Premacy/Mazda5 (Driveline/Axle) specifies a front-wheel-drive transaxle with left and right front driveshafts, and no propeller shaft, the Mazda Electronic Parts Catalogue (EPC) for the CW series shows no listing for a centre/support bearing, and 2012 Premacy/Mazda5 specification sheets list the drive layout as FF (front-engine, front-wheel drive), with no AWD option for this generation. A centre-bearing is a support for a two-piece prop shaft, which is a feature of rear- or all-wheel-drive layouts — not front-wheel drive.

Why it’s not used is all down to the drivetrain design. The Premacy’s engine and gearbox form a transaxle that sends power straight to the front wheels through short CV-shaft assemblies. There’s no long tailshaft running down the middle of the car, so there’s nothing that needs a centre support. That compact FWD package saves weight and space and reduces the number of driveline service items — which is why a centre-bearing simply isn’t part of this vehicle’s maintenance picture.

Worth noting: some FWD cars (including many Mazdas) run a right-hand intermediate shaft with a support bearing bracket to keep the driveshaft lengths balanced. That’s not a prop-shaft centre-bearing, and it sits on the front axle line — different part, different job. If someone’s talking “centre bearing” on a Premacy, they’re usually mixing up the terminology.

Chasing a vibration or droning noise and thought it might be a centre-bearing? On a 2012 Premacy, the usual suspects are:

• Front wheel hub bearings
• CV joints or torn CV boots
• Tyre balance, cupping, or uneven wear
• Engine or transmission mounts
• The RH intermediate shaft support bearing (if fitted), which is on the front driveshaft assembly

So, for workshop servicing of a 2012 Mazda Premacy, a “centre-bearing service” isn’t a thing — focus diagnostics and maintenance on the front driveline, suspension, tyres, and mounts instead.

FAQs

Does a 2012 Mazda Premacy have a centre-bearing?
No. Technical documentation (Mazda CW Workshop Manual and Mazda EPC) shows the Premacy/Mazda5 is front-wheel drive with no prop shaft, so there’s no centre-bearing in this model.

What could cause a humming or vibration if it’s not the centre-bearing?
Common causes include worn front wheel bearings, out-of-balance or cupped tyres, CV joint wear, or soft engine/transmission mounts. The right-hand intermediate shaft support bearing (on the front axle) can also drone when tired.

Is there any driveline bearing on the Premacy that needs periodic replacement?
There’s no scheduled interval for driveline bearings. They’re replaced on condition. During services, a technician should check for play or noise in wheel bearings, inspect CV boots, and listen for any rumble from the RH intermediate shaft support bearing if fitted.