Parts for your 2008 Subaru Impreza-Wheel bearings

2008 Subaru Impreza wheel bearings

Based on the Subaru Factory Service Manual for the 2008 Impreza (GE/GH/GR), Subaru FAST parts catalogues, and major bearing manufacturers’ application guides (NTN, SKF, Timken), the 2008 Subaru Impreza is fitted with sealed, unitised wheel bearing and hub assemblies at both the front and rear. These are double‑row angular‑contact ball bearings integrated with the hub, and are designed to be non‑serviceable, when worn or noisy, the complete hub/bearing unit is replaced. This confirms wheel bearings are absolutely relevant and used on this model.

The wheel bearings on a 2008 Subaru Impreza quietly do the heavy lifting. They let each wheel spin smoothly with minimal friction, while carrying vehicle weight and cornering loads over Aussie and Kiwi roads. They also keep everything running true so the ABS and stability systems get clean signals from the tone ring. Because they’re sealed hub units, there’s no greasing or routine adjustment — the job is to keep water and dirt out, hold the correct internal preload, and spin freely for heaps of kilometres.

As part of regular servicing, it’s worth listening for a low droning or growling that changes with road speed and may get louder when loading one side in a gentle lane change. A failing bearing can also create vague steering, ABS faults, or uneven tyre wear. During a service, a quick free‑spin of each wheel, a feel for roughness, and a check for play at 12 and 6 o’clock can flag issues early. Because the bearings are sealed, any sign of roughness or movement means replacement, not repacking.

• Replace the hub/bearing as a complete unit, don’t try to repack it.
• Use quality parts that match the OE spec and ABS tone configuration.
• Torque the axle nut and mounting bolts to factory spec — no rattle guns.
• Avoid striking the hub, damage can shorten bearing life.
• If the knuckle is loosened, book a wheel alignment check afterwards.

Owners who drive on rough roads, deep water, or with oversized wheels may see earlier wear. Catching a noisy bearing early protects tyres, brakes, and ABS components. After fitting, a short road test on varied speeds is the go: listen for silence, check ABS lights, and recheck torque after initial heat cycles if specified by the supplier.

Popular questions about 2008 Subaru Impreza wheel bearings

How long do wheel bearings last on a 2008 Subaru Impreza?

With normal driving and good tyres, many sealed hub bearings will run well past 120,000–160,000 kilometres. Harsh roads, frequent water crossings, a bent rim, or incorrect torque on the axle nut can shorten that.

Routine inspections during services help spot noise or play early, so the bearing can be swapped before it starts chewing out tyres or upsetting the ABS.

What are the common signs of a bad wheel bearing on an ’08 Impreza?

A steady hum or growl that rises with speed, a change in noise when you gently weave the car, play felt at the wheel with the car off the ground, ABS warnings, or uneven tyre wear are the usual giveaways.

Tyre roar can sound similar, so a technician will road test, rotate tyres, and spin each wheel by hand to be sure it’s the bearing.

Do the Impreza’s wheel bearings need greasing or adjustment?

No. They’re sealed, unitised hub bearings — there’s no repacking or preload adjustment. If one’s noisy or rough, the correct fix is replacing the hub/bearing assembly and torquing everything to spec.