Parts for your 2002 Mazda 6-Universal joints

2002 Mazda 6 universal joints — are they actually used?

Short answer: no, not on the driveline of an Australian or New Zealand–spec 2002 Mazda 6. Technical sources including the Mazda 6 GG/GY Workshop Manual (Driveline/Axle section, 2002–2005) and Autodata list the front drive shafts as using constant velocity (CV) joints — an inboard DOJ and an outboard Rzeppa CV — with no propeller shaft and no cross-type universal joints on front-wheel-drive models. Mazda Australia’s 2002 launch specifications also show all variants as front-wheel drive, which aligns with the absence of driveline U-joints.

Why no universal joints? The 2002 Mazda 6 was engineered primarily as a front-wheel-drive platform. In FWD layouts, the engine and transaxle drive the front wheels through half shafts with CV joints. CV joints maintain smooth power delivery while the wheels steer and move through suspension travel — something a traditional universal joint can’t handle as smoothly at large steering angles. Universal joints are more common on rear-wheel-drive prop shafts and some older 4x4s, not modern FWD sedans.

What should owners look after instead? If someone’s chasing a “U-joint” issue on a 2002 Mazda 6, chances are they’re really dealing with CV joints or related components. It’s worth checking:

• CV boots for splits, grease sling, or perishing
• Clicking or clacking on full lock under acceleration (outer CV wear)
• Shudder or vibration on throttle (inner CV wear, mounts, or tyres)
• Axle nut torque and hub bearing condition

There is a small caveat: the steering column typically uses an intermediate shaft with a small universal joint. That’s not a driveline U-joint, but if the steering feels notchy or there’s play, a worn steering U-joint could be the culprit and is usually replaced as an assembly.

If you’ve imported or modified an all-wheel-drive variant not originally sold in AU/NZ (or you’re looking at a later Mazdaspeed/MPS model), the driveline layout differs. Those versions can use a propeller shaft with CV-type couplings, traditional cross U-joints still aren’t common on these cars according to workshop literature for the GG/GY platform.

• Does a 2002 Mazda 6 have universal joints?
  For AU/NZ front-wheel-drive models, no. The car uses CV joints on the front drive shafts, with no rear propeller shaft or driveline U-joints listed in Mazda’s GG/GY workshop documentation and period specification sheets.
• What should be serviced instead of U-joints?
  Inspect and maintain the CV boots and joints, hub bearings, and engine/trans mounts. Replace any split boots promptly and address clicking or vibration early to avoid needing complete shaft replacement.
• Is there any universal joint on the vehicle at all?
  The steering column’s intermediate shaft typically has a small U-joint. Symptoms include notchy feel or free play. It’s separate from the driveline and replaced as a unit if worn.