Parts for your 2008 Toyota Mark x-Wheel hubs

2008 Toyota Mark X wheel hubs — what they do and when to service them

Wheel hubs are absolutely relevant to the 2008 Toyota Mark X (GRX12x). Toyota’s Repair Manual for the GRX120/121 series details “Front Axle Hub” and “Rear Axle Hub” removal/installation procedures, and the Toyota Electronic Parts Catalog lists “Front Axle Hub Sub-Assembly” and “Rear Axle Hub & Bearing Assembly” for this model. Major bearing manufacturers’ catalogues also list complete hub units for the Mark X across these years. So yes — the 2008 Mark X is fitted with wheel hubs front and rear.

On a 2008 Toyota Mark X, the wheel hubs sit between the wheels and the suspension knuckles, allowing the wheels to rotate smoothly while keeping everything tight and true. Each hub assembly houses a sealed bearing, the mounting face for the wheel, and provisions for the ABS sensor/encoder. The fronts on the Mark X (RWD) are non-driven bolt-on hub units, while the rears are hub-and-bearing assemblies that carry the axle shaft and read the ABS tone/encoder.

Because these are sealed units, there’s no periodic greasing — they’re designed to be low-maintenance. Servicing revolves around inspection and timely replacement. During routine services or tyre rotations (say every 10,000 km), it’s smart to check for play at the wheel (grasp at 12 and 6 o’clock), listen for a growl that rises with road speed, and look for ABS warning lights. Any rumbling, looseness, or roughness points to a tired hub bearing.

When replacing, go with quality hub assemblies suited to your exact GRX12x variant (RWD vs AWD, and ABS spec). The front hubs are typically a straightforward bolt-off/bolt-on job. At the rear, take extra care with the ABS sensor and wiring — they’re easy to damage. Avoid hammering the hub, use proper pullers and follow factory torque specs for the hub bolts and any axle fasteners. If one side has clearly failed, it’s fine to replace that side only, but on higher-kilometre cars many owners opt to do both sides on the same axle for peace of mind.

Driving on a noisy or loose hub can lead to uneven tyre wear, brake pulsation from rotor runout, and poor ABS performance. Many Mark X hubs run well beyond 120,000–200,000 km on good roads, rough surfaces, curb knocks, and water ingress shorten life. Keep the underbody clean, avoid pressure-washing directly at the hub seals, and fix any split splash shields to help your hubs go the distance.

• Common symptoms: humming or growling with speed, ABS light, wheel play, uneven tyre wear.
• Service tip: inspect at each tyre rotation, replace as assemblies when noisy or loose.
• Parts check: match to VIN for the correct front and rear hub assemblies.

Popular questions about 2008 Toyota Mark X wheel hubs

Do Mark X wheel hubs come with ABS sensors?
Most replacement hubs include the encoder/tone ring, but the wheel speed sensor itself is separate and usually reused. Always inspect and carefully remove the sensor before hub replacement, and clean the mounting face to ensure a good signal.

How can they tell hub noise from tyre or road noise?
Hub noise typically grows with speed and often changes when loading the car left or right through a gentle lane change. Tyre roar is more constant and can change after a tyre rotation. A mechanic can confirm by spinning the wheel off the ground and feeling for roughness.

Should both hubs on an axle be replaced together?
It’s not mandatory. If only one hub is noisy or has play, replacing that side is acceptable. If the vehicle has high kilometres or similar wear both sides, replacing hubs in pairs can save labour and prevent a near-term second visit.