Parts for your 2010 Subaru Impreza-Wheel bearings

2010 Subaru Impreza wheel bearings: purpose, care and when to replace

Technical sources confirm wheel bearings are absolutely fitted to the 2010 Subaru Impreza. The Subaru Factory Service Manual for MY2010 Impreza (GE/GH/GR/GV, Suspension/Hub Unit sections) and the Subaru parts catalogue both specify front and rear “hub unit bearing” assemblies, i.e., sealed, non-serviceable wheel bearings integrated into the hub. These hub units are standard on AWD Impreza models, so wheel bearings are relevant for every 2010 Impreza on Aussie and Kiwi roads.

On this model, the wheel bearings sit inside a sealed hub assembly. Their job is to let the wheel spin smoothly while carrying the load of the car, coping with cornering forces and the AWD drivetrain’s torque. Because they’re sealed, there’s no greasing during routine servicing, instead, it’s about inspection, correct fitment, and timely replacement when wear shows up.

As part of regular servicing, a technician should road-test and listen for a humming or growling noise that rises with speed, check for play by rocking the wheel at 12-and-6 and 9-and-3 o’clock, and look out for ABS warning lights triggered by wheel-speed sensor signal issues from a rough bearing. On hoist, they’ll spin each wheel by hand for roughness. Any looseness, rumble, or heat discoloration around the hub means the hub/bearing assembly is due.

Replacement on the 2010 Impreza generally involves removing the brake caliper and rotor, unplugging the wheel-speed sensor, and unbolting the hub unit from the knuckle. Because the bearing is sealed, the fix is to replace the whole hub assembly rather than attempting to regrease or rebuild it. It’s crucial the axle nut and hub bolts are torqued to Subaru FSM specifications and that mating faces are clean and corrosion-free, incorrect torque can shorten bearing life.

To maximise life in Australian and New Zealand conditions—think corrugations, coastal air and the odd water crossing—keep tyres correctly inflated and rotated, avoid pressure-washing directly at the hub seals, ensure wheel nuts are tightened evenly to spec, and address any misalignment that could add extra side load. With sensible driving and good maintenance habits, many Impreza wheel bearings run well past 150,000 km, but once noise or play is evident, prompt replacement protects tyres, brakes, and the CV joints.

• Typical signs of wear: speed-related hum, droning in corners, ABS light, feathered tyre wear, or detectable wheel play.
• Service tip: always recheck torque after a brief road test once the hub settles.

How long do 2010 Subaru Impreza wheel bearings usually last?

On well-maintained cars, 120,000–200,000 km is common. Rough roads, big potholes, or oversized wheels can shorten that span. If there’s rumble, play, or an ABS fault related to the hub, replacement is the smart move.

Because the bearings are sealed, longevity hinges on correct torque, clean installation, and keeping water and grit away from the hub face. Tyre alignment and rotation matter too.

What are the classic symptoms of a failing wheel bearing on this model?

A steady hum that grows with speed, a drone that changes when cornering, or a faint grinding you can feel through the spring when the wheel is spun by hand. In some cases the ABS light appears due to a disturbed sensor signal from a rough hub.

Any looseness when rocking the wheel, or heat around the hub after a drive, also points to a tired bearing.

Can the bearing be repacked, or does the whole hub need replacing?

For the 2010 Impreza the bearing is part of a sealed hub unit. It’s not designed for regreasing or adjustment. The correct repair is to replace the complete hub assembly on the affected corner.

That approach restores the bearing, the mounting flange, and the integrated tone ring for ABS in one go, and avoids repeat jobs.