Parts for your 2009 Subaru Impreza-Wheel hubs

2009 Subaru Impreza wheel hubs: what they do and when to replace them

Wheel hubs are absolutely used on the 2009 Subaru Impreza. Subaru’s factory service manual for MY2009 Impreza (Chassis/Suspension sections), Subaru’s OE parts catalogue, and major bearing manufacturers’ catalogues (NTN/NSK, Timken, SKF) all specify front wheel hub and bearing components and a rear hub unit with integrated bearing and ABS tone ring for this model. So yes—wheelhubs are relevant and fitted to the 2009 Subaru Impreza.

On a 2009 Subaru Impreza, the wheel hub is the sturdy bit that the wheel bolts to, carrying the wheel studs and supporting a sealed bearing so the wheel spins smoothly. It also locates the brake rotor and, on ABS-equipped cars, provides the tone ring or encoder for the wheel speed sensor. With Subaru’s AWD, healthy hubs and bearings keep driveline loads in check, steering feel crisp, and tyres wearing evenly.

The front of many 2009 Impreza variants uses a separate hub pressed into a double‑row bearing in the steering knuckle. The rear typically uses a bolt‑in hub unit with the bearing integrated. Both are sealed, so there’s no regular greasing—they’re designed to be fit‑and‑forget until wear shows up.

• Common signs it’s time to replace a hub/bearing:
  • A speed‑related hum or growl that changes when turning
  • ABS light or erratic ABS operation
  • Play when rocking the wheel at 12 and 6 o’clock
  • Uneven tyre wear or a hot hub after a drive

During routine servicing, it’s smart to spin each wheel, listen for roughness, and check for play while the car’s on a hoist. Keep wheel nuts torqued to the factory spec using a torque wrench—over‑tightening can bruise bearings. Avoid hard kerb hits and wash away coastal salt, both shorten hub life, especially on Kiwi and Aussie roads with corrugations and beach runs.

When replacement’s due, the rear hub unit is generally a straightforward bolt‑out/bolt‑in job, paying attention to the ABS sensor and backing plate. The front usually needs a press to remove and install the bearing and hub in the knuckle—done wrong, the bearing can be damaged before it leaves the workshop. Fresh circlips, seals, and axle nuts are recommended, and the axle nut must be torqued to the Subaru spec and staked as required.

Choose quality parts that match the exact variant (stud pattern, ABS encoder type, and trim level). Genuine Subaru, NTN/NSK, SKF, and Timken are dependable picks. A good workshop can typically handle a rear corner in about an hour or so, and a front corner may take longer due to press work. If the knuckle is removed, a wheel alignment check is a sensible add‑on.

• Quick tips for longer hub life:
  1. Torque wheel nuts properly—no rattle‑gun heroics
  2. Rotate tyres on schedule and listen for new noises
  3. Address any ABS warnings promptly

Popular questions about 2009 Subaru Impreza wheel hubs

Do all 2009 Subaru Imprezas use the same wheel hubs?

Not exactly. While all 2009 Imprezas use hubs, fitment differs by model and trim. Many non‑STI models run a 5x100 stud pattern and share similar front press‑in hub/bearing arrangements and bolt‑in rear hub units. The STI uses different performance‑spec components (commonly 5x114.3) and unique hub/bearing designs. Always match parts to VIN and ABS encoder type.

How long should the hubs last on a 2009 Impreza?

It varies with driving and environment. On typical Aussie and NZ roads, quality hubs and bearings often run well past 150,000 kilometres, but frequent potholes, water crossings, or salty coastal use can shorten that. Early signs—humming that grows with speed or ABS quirks—are the cue to inspect before collateral damage occurs.

Can a DIYer replace them at home?

Rear bolt‑in hub units are DIY‑friendly with basic tools and care around the ABS sensor. Front hubs are more involved, the bearing and hub must be pressed in and out correctly, and the axle nut torqued precisely. Without a press and the right supports, it’s safer to have a workshop handle the front.