Parts for your 2008 Subaru Impreza-Wheel bearings

2008 Subaru Impreza Wheel Bearings

Based on Subaru factory service information and OEM parts catalogues for the 2008 Subaru Impreza, wheel bearings are absolutely fitted and relevant to this model. The Impreza of this era uses sealed, unitised wheel bearings—either as a bolt-in hub assembly or a press-fit cartridge in the knuckle, depending on variant. They’re a core safety and driveline component, not an optional extra.

Wheel bearings let each wheel spin smoothly with minimal friction while supporting the vehicle’s weight and handling cornering loads. On the 2008 Impreza—especially with AWD—bearings also help keep ABS and stability control sensors reading accurately. Because they’re sealed units, they’re designed to keep water and road grit out and lubricant in, delivering quiet operation and steady tyre wear when everything’s healthy.

There’s no routine greasing on these bearings, so maintenance is mostly about inspection and timely replacement. At regular services, a good workshop will road-test for a humming or growling noise that rises with speed, then check for play by rocking the wheel at the 12 and 6 o’clock positions. They’ll also spin the wheel and listen near the hub, and look for any ABS warning lights that might hint at a failing tone ring or sensor interference.

• Common symptoms: speed-related hum, noise changing when turning, ABS light on, heat at the hub after a drive, or noticeable play/clunks.
• Driving conditions matter: rough roads, water crossings, and coastal salt can shorten bearing life.

When replacement’s due, the sealed design means swapping the bearing or complete hub assembly rather than repacking. Quality matters—sticking with reputable brands keeps noise down and longevity up. The axle/hub nut should be replaced and torqued to factory spec, then staked as specified. Avoid using a rattle gun to “pull” components together, support the hub properly and torque bolts in sequence. Protect ABS sensors and wiring during the job, and clean the mating faces so the hub sits true. Depending on what’s been loosened, a wheel alignment check afterwards is wise—particularly if strut-to-knuckle bolts or rear arm bolts were disturbed. On high-kilometre cars, many owners replace the opposite side soon after, though it’s fine to do bearings individually if only one is noisy.

With proper inspection at each service and sensible driving, most 2008 Impreza wheel bearings run for many kilometres without drama, keeping the car quiet, safe, and tidy on tyres.

Popular questions

How long do wheel bearings last on a 2008 Subaru Impreza?
Many last between 120,000 and 200,000 kilometres, but it varies with road quality, wheel/tyre size, and exposure to water or salt. Big wheels, aggressive tyres, and rough tracks can bring the interval forward. Regular checks help catch a noisy unit early before it affects ABS components or the hub.

Is it safe to keep driving with a noisy wheel bearing?
Not recommended. A failing bearing can overheat, increase stopping distances, upset ABS readings, and in extreme cases let the hub wobble. It’s best to book it in promptly to avoid collateral damage and higher repair costs.

Do I need a wheel alignment after replacing a wheel bearing?
Often advisable. If the job involved loosening strut-to-knuckle bolts or any rear suspension arms, the alignment can shift. Even if not, a quick check ensures the steering stays straight and tyre wear remains even.