Parts for your 2003 Mazda 6-Thrust bearing

2003 Mazda 6 Thrust Bearing — What’s fitted and how to look after it

On the 2003 Mazda 6 (GG/GY), a thrust bearing is absolutely relevant for manual-transmission models. Mazda’s workshop manual for the GG/GY clutch system details a clutch release bearing (commonly called a thrust bearing in Australia and New Zealand) that sits on the gearbox input shaft and acts on the pressure plate when the pedal’s pressed. The Mazda Electronic Parts Catalogue lists a “release bearing” for manual variants, and major clutch suppliers (e.g., Exedy) include this bearing in their Mazda 6 clutch kits. Automatic models don’t use a clutch release bearing, though the engine itself does have crankshaft thrust bearings integrated into the main bearing set to control end float, as documented in the engine section of the workshop manual.

In practical terms, the thrust bearing’s job is to transfer pedal force smoothly to the pressure plate fingers so the clutch can disengage cleanly. When it’s healthy, gear changes are silky and quiet. When it’s tired, drivers will often notice a chirp, squeal, or grinding noise with the clutch pedal depressed, a notchy pedal feel, or trouble engaging gears at a standstill.

There’s no fixed kilometre interval to replace a thrust bearing, it’s generally renewed whenever the clutch is replaced. That’s best practice because the bearing lives the same hard life as the pressure plate and friction disc. For a 2003 Mazda 6 manual, a quality clutch kit—disc, pressure plate, release (thrust) bearing, and pilot bearing/bush—is the sensible way to go.

• Symptoms worth checking: noise only when the clutch pedal is down, clutch pedal vibration, shudder on take-off, and hard shifts into first or reverse.
• Good workshop tips: lightly grease the guide tube with high-temp moly grease (sparingly), inspect the release fork and pivot for wear, check the slave cylinder and hose for leaks, and always bleed the hydraulics properly.

If the vehicle’s done big kilometres or has clutch chatter, it’s smart to inspect the flywheel surface and rear main seal while the gearbox is out. City driving, towing, or spirited runs up the hills can all age the bearing faster. With the right parts and a careful install, the Mazda 6’s thrust bearing will deliver quiet, drama-free shifts for years.

Popular questions

Does a 2003 Mazda 6 have a thrust bearing?
Yes—manual models do. It’s the clutch release (thrust) bearing that presses on the pressure plate when the pedal’s pushed. Automatics don’t use a clutch release bearing, though the engine does have crankshaft thrust bearings to control end float.

What are the signs the thrust bearing is worn on a Mazda 6?
Listen for a chirp, squeal, or rumble with the clutch pedal depressed, plus a rough pedal feel or difficulty selecting gears at a stop. If the noise disappears when the pedal’s released, the release/thrust bearing is a prime suspect.

Should the thrust bearing be replaced with the clutch?
Definitely. Replacing it with the disc and pressure plate avoids doubling up on labour later and helps ensure smooth, quiet operation after the job. It’s also a good time to check the pilot bearing/bush, fork, pivot, and hydraulics.