Parts for your 2012 Mazda Premacy-Thrust bearing

2012 Mazda Premacy thrust bearing: what it is, whether your car has one, and service tips

Based on the Mazda Premacy/Mazda5 (CW) Workshop Manual (Clutch System and Manual Transmission sections) and Mazda’s Electronic Parts Catalogue, the 2012 Mazda Premacy uses a clutch thrust bearing (also called a release or throwout bearing) on manual-transmission models. Automatic/CVT variants don’t use a clutch thrust bearing because they employ a torque converter, as described in the Automatic Transmission section of the same manual. The engine does have crankshaft thrust bearings integrated into the main bearing set, but these aren’t routine service items unless the engine is being overhauled.

On manual Premacy models, the thrust bearing lives between the clutch fork and the pressure plate’s diaphragm spring. Its job is simple but critical: when the driver presses the clutch pedal, the bearing lets the fork push smoothly against the spinning pressure plate, disengaging the clutch without metal-on-metal grind. A healthy bearing keeps pedal effort consistent, shifts clean, and noise down. Over time, heat, load, and dust can dry the internal grease and wear the raceways, which is when squeaks, rumbles, or a gritty pedal feel start to show up.

There’s no set replacement interval for the thrust bearing, it’s replaced on condition and almost always bundled with a clutch kit because the gearbox has to come out anyway. That’s why most techs will recommend doing the lot in one go: clutch disc, pressure plate, release (thrust) bearing, and usually the pilot bearing/bush and a rear main seal check. Expect roughly 6–8 hours of labour for a typical FWD clutch job on a Premacy, varying with equipment and corrosion.

• Common signs it’s tired: noise with the clutch pedal depressed (chirp, whirr, rumble), a notchy or heavy pedal, or difficulty selecting gears.
• Good practice during replacement: lightly grease the bearing guide tube and release fork contact points with high-temp moly grease, never contaminate the clutch friction surfaces.
• While in there: inspect the fork pivot, input shaft seal, and the clutch slave cylinder/line for leaks or play.

Driving habits make a big difference. Riding the clutch or lots of stop–start work shortens life, neat pedal use and proper gear selection help it last well past 100,000 kilometres. A quiet pedal and clean, crisp shifts are the tell-tale signs the thrust bearing is doing its job.

FAQs

Does a 2012 Mazda Premacy with an automatic gearbox have a thrust bearing?

Not a clutch thrust/release bearing. Automatic Premacy models use a torque converter, so there’s no release bearing in the bellhousing. The engine itself does have crankshaft thrust bearings, but they’re internal to the engine and not a regular service item unless the engine is being rebuilt.

What symptoms point to a worn thrust bearing on a Premacy?

Noise that appears when the clutch pedal is pressed (chirping, whirring, or a rough rumble) is the classic sign. A gritty or heavy pedal and gears that feel reluctant to engage can also be linked. If the noise goes away when the pedal is released, the release (thrust) bearing is a prime suspect.

Should the thrust bearing be replaced on its own?

It’s technically possible but not recommended. Because the gearbox has to come out, most workshops fit a full clutch kit (disc, pressure plate, release bearing) and inspect the pilot bearing and seals at the same time. It’s a smarter spend on labour and helps avoid doing the job twice.