Parts for your 2008 Toyota Mark x-Centre bearing

2008 Toyota Mark X centre-bearing: purpose, symptoms, and servicing tips

Technical documentation confirms a centre-bearing is fitted to the 2008 Toyota Mark X. Toyota’s Electronic Parts Catalog (EPC) for the GRX12# series (2004–2009) lists a “Bearing Assy, Center Support, Propeller Shaft,” and the Toyota Mark X GRX120/125 Repair Manual (Propeller Shaft section) details removal and installation of the centre support bearing on the two-piece prop shaft. Public EPC aggregators such as ToyoDIY and Amayama list the same part for 2008 models. So yes—the centre-bearing is relevant on this vehicle.

On the Mark X, the centre-bearing supports the two-piece propeller shaft that runs from the gearbox to the rear diff. Its rubber-isolated mount carries the shaft’s mid-point and keeps the halves aligned, controlling driveline angles as the body moves. That takes a heap of load off the universal joints, smooths out NVH, and helps the car feel settled under throttle, especially on rough chip or when towing light loads.

When the centre-bearing starts to go, the Mark X often shows a tell-tale shudder on take-off, a vibration at 60–90 km/h under load, or a clunk when coming on and off the throttle. The rubber cushion can crack or separate, and the bearing can get noisy. These symptoms can be mistaken for tyre or wheel balance, diff issues, or engine mounts, so a proper driveline inspection on a hoist is the way to go.

There’s no scheduled replacement interval, but it’s smart to have it checked during routine servicing—say every 10,000–15,000 km when the car’s already in the air. If replacement’s needed, a competent workshop will:

• Mark the prop shaft flanges and yokes to preserve phasing and balance.
• Remove the two-piece shaft, press off the old bearing, and fit the new bearing and support.
• Torque fasteners to factory spec and inspect U-joints while it’s out.

Quality matters here—genuine or reputable aftermarket bearings last longer and keep NVH in check. If the car’s been lowered or has worn mounts, correcting driveline angles will help the new bearing live a long life. Driving with a badly failed centre-bearing risks damaging the transmission extension housing or diff, so it’s worth sorting promptly.

Popular questions

Does every 2008 Mark X have a centre-bearing?
All GRX12# Mark X variants use a two-piece rear prop shaft with a centre support bearing. That includes rear-wheel drive and the “Four” AWD versions, which also rely on a centre-bearing to support the rear prop shaft assembly.

How long does a centre-bearing typically last on a Mark X?
Many see well over 150,000–250,000 km, but life depends on road conditions, torque load, and driveline angles. Lowered suspension, harsh launches, or perished mounts can shorten its lifespan. Regular inspections help catch issues before they become a headache.

Can the centre-bearing be replaced without changing the whole prop shaft?
Yes. The bearing and support can be replaced on the existing shaft. The critical bit is preserving phasing marks and using proper tools and torque specs. If the shaft is damaged or badly out of balance, a complete or rebuilt assembly may be the better choice.