Parts for your 2012 Toyota Mark x-Cv boots

2012 Toyota Mark X CV boots: what they do and how to look after them

Based on Toyota’s technical literature—the Electronic Parts Catalogue for GRX13# (Mark X) and the Repair Manual sections covering Rear Drive Shaft and (on “Four” AWD variants) Front Drive Shaft—the 2012 Toyota Mark X is fitted with constant-velocity (CV) joints and rubber CV boots. RWD models use CV boots on the rear half-shafts, AWD “Four” models have them at both ends. So yes, CV boots are absolutely relevant on a 2012 Mark X.

On this Mark X, the CV boots are the flexible rubber bellows that seal each CV joint, keeping high-moly grease in and water, grit, and dust out. They let the joint articulate smoothly while the suspension moves and, on AWD versions, while steering as well. Whether it’s a rear-drive V6 cruiser or an AWD “Four”, intact boots are the difference between a quiet, tight driveline and a costly CV joint replacement.

Servicing-wise, it’s smart to have the boots checked at every routine service (around 10,000–15,000 km) or during any WOF/safety inspection. For cars that see plenty of unsealed roads, beach trips, or hot stop–start city driving, shorten the interval. A quick visual once-over on a hoist goes a long way.

• Tell-tales a boot’s failing: slung grease on the inner wheel or suspension arms, cracks or splits in the rubber, loose clamps, or a burnt/oily smell on the boot.
• Symptoms the joint may already be worn: clicking or clacking that changes with throttle when cornering (outer joint), vibration under load (often inner joint), or a shudder on take-off.

If a boot is split, the fix is to replace the boot and clamps and repack the joint with the correct Toyota-specified CV grease straight away. If contamination has been in there for a while, the joint may be pitted and need replacing as an assembly. Use quality boot kits, replace both sides on the same axle if the rubber’s aged, and always follow Toyota torque specs for axle/hub fasteners and suspension arms. After rear shaft work, a quick check of rear alignment components for any disturbed settings is good practice.

For RWD Mark X owners, don’t be lulled into thinking CV issues are a front-drive problem—your rear half-shafts depend on those boots just as much. Keep them tidy and they’ll do hundreds of thousands of kilometres without dramas.

Popular questions about 2012 Toyota Mark X CV boots

How often should the CV boots be inspected on a 2012 Mark X?
They should be checked at every service, roughly every 10,000–15,000 km. If the car sees rough roads, beach use, or a lot of heat and stop–start work, inspect more frequently. A quick look for cracks, leaks, or loose clamps is usually enough.

Can a split CV boot be patched, or does it need replacing?
Patch fixes and “split boots” are only short-term at best. Once a boot has split, grit and water get in and grease gets out. Replace the boot and clamps and repack the joint promptly. If there’s clicking or visible corrosion inside, the whole CV joint likely needs replacing.

What are the symptoms of a bad CV joint on a Mark X?
Grease flung around the wheel well, clicking on acceleration while cornering, vibration under load, or a shudder on take-off. On AWD models you might notice it more through the steering when turning, on RWD, it’s often heard from the rear under load.