Parts for your 2017 Subaru Impreza-Wheel hubs

2017 Subaru Impreza wheel-hubs

Wheel-hubs are absolutely relevant to the 2017 Subaru Impreza. The Subaru 2017MY Impreza Service Manual (Chassis: Front Axle and Rear Axle sections) details bolt-on hub unit bearings at all four corners, and the Subaru Genuine Parts Catalogue lists front and rear hub assemblies for this model. Major bearing makers’ fitment catalogues (e.g., NTN/SKF) also specify integrated hub units for the 2017 Impreza. That confirms the vehicle is fitted with hub-and-bearing assemblies rather than serviceable, greasable bearings.

On this Impreza, the wheel-hub assembly is a sealed, bolt-in unit that carries the wheel studs, supports vehicle weight, and allows the wheel to rotate smoothly around a precision double-row bearing. It also works with the ABS/ESC system, the speed encoder is built into the hub and read by a nearby sensor. Because it’s sealed, there’s no periodic greasing—when it wears out, the whole hub unit is replaced.

During routine servicing, a few simple checks go a long way. A quiet, even road test is great for picking up early humming or droning that changes with speed or when loading the car gently left-right. With the car safely lifted, a technician can check for play by rocking the wheel at 12 and 6 o’clock and spin it to feel for roughness. Any free play, growl, metallic clicking, or an ABS light that coincides with a noise is a strong hint the hub’s on the way out.

There’s no fixed replacement interval—hub life depends on kilometres, road conditions, and kerb strikes—but many last well beyond 120,000 km. When replacement is due, the job typically involves removing the brake calliper and rotor, the axle nut, and the four hub bolts from the back of the knuckle, then drawing the unit out. On higher-kilometre cars, corrosion can make the hub cling to the knuckle, careful use of penetrant and proper pullers helps avoid damage. Always torque the axle nut and hub bolts to the factory specification from the service manual, clean the mating faces, and ensure the ABS sensor is clean and correctly seated. Over-tightening wheel nuts can brinell a good bearing, so accurate wheel-nut torque matters. An alignment isn’t usually required after a hub swap, but it’s smart to check tyre wear and balance. Keeping tyres correctly inflated and avoiding potholes and harsh kerb hits will extend hub life on this AWD Impreza.

How can someone tell a 2017 Impreza wheel-hub is failing?

Common signs include a speed-dependent hum or drone that gets louder when loading one side of the car, roughness felt when spinning the wheel off the ground, play when rocking the tyre at 12 and 6, uneven tyre wear, or an ABS/ESC warning if the encoder signal is affected. Prompt inspection prevents collateral damage to tyres or brakes.

Does replacing a wheel-hub require a wheel alignment?

Usually not. The hub bolts to the knuckle at fixed locations, so geometry doesn’t change. However, if suspension components were disturbed or if there’s existing tyre wear, a post-repair alignment check is sensible to keep the Impreza tracking straight and protect tyre life.

Are the front and rear wheel-hubs the same on a 2017 Impreza AWD?

No. Front and rear hubs are different part numbers and are not interchangeable. Both are sealed unit bearings, but they’re designed for their specific locations, loads, and ABS encoder arrangements. Always use the correct hub for the corner being serviced.