Parts for your 2009 Subaru Impreza-Wheel studs nuts

2009 Subaru Impreza wheel studs and nuts (wheelstudsnuts)

Wheel studs and nuts are absolutely relevant and used on the 2009 Subaru Impreza. This is confirmed by Subaru’s Factory Service Manual (2009 Impreza, Wheel & Tyre/WU section), the MY2009 Owner’s Manual specs listing wheel nut torque, and Subaru’s FAST parts catalogue, which identifies front and rear wheel studs (M12 × 1.25) with separate conical-seat nuts.

The wheel studs and nuts on a 2009 Subaru Impreza do a deceptively big job: they clamp the wheel securely to the hub, maintaining even pressure and keeping the rotor and wheel centred so braking and handling stay consistent. Subaru specifies a dry torque of 120 N·m (about 88.5 ft‑lb), and that matters—too little torque lets the wheel work loose, too much risks stretching studs or damaging threads.

During routine servicing, they’re worth a quick once-over. Best practice is to clean the hub face and wheel seating surfaces, hand-thread each nut to avoid cross‑threading, then torque in a star pattern. After a wheel-off job (tyres, brakes, rotation), it’s smart to recheck torque after 50–100 km. Avoid lubricating the threads or the nut’s seat, Subaru documentation expects dry threads for accurate torque. If a rattle gun is used to remove or snug them, always finish with a torque wrench.

Replacement is straightforward when needed. Signs a stud or nut should be replaced include damaged or rolled threads, a nut that won’t hold torque, a stud that spins in the hub, or obvious corrosion pitting. If a stud snaps, don’t drive far—clamp load drops and the remaining studs cop extra stress. To replace a stud, the usual workshop approach is to remove the caliper and rotor, then press the old stud out from the rear of the hub and press a new one in squarely. While some draw a new stud in using a spacer and nut, the factory-style press fit is cleaner and reduces the risk of hub flange damage. Match thread pitch (M12 × 1.25) and seat type (OEM conical) and avoid mixing different seats on aftermarket wheels. If several studs on one hub are dodgy, inspect the flange for distortion.

• Service tips: dry torque to 120 N·m, star pattern, recheck after 50–100 km, no grease on threads or seats.
• When to replace: cross‑threading, stretched or spinning studs, corrosion, or nuts that won’t torque consistently.

Popular questions

What’s the wheel nut torque for a 2009 Subaru Impreza?

Subaru specifies 120 N·m (about 88.5 ft‑lb) on clean, dry threads and seats. Tighten in a star pattern, then recheck after 50–100 km of driving following any wheel-off job.

Avoid lubricants on the threads or taper, oil or anti‑seize will alter clamping force and can over‑stress studs even at the correct torque reading.

What size are the wheel studs and nuts on a 2009 Impreza?

The studs are M12 × 1.25 thread. OEM nuts use a 60‑degree conical seat and typically a 19 mm hex. Aftermarket wheels may need different seat styles—always match the nut seat to the wheel seat.

If using locking nuts, stick with quality items that match M12 × 1.25 and the correct seat to avoid wheel vibration or loosening.

How can someone tell a stud or nut needs replacing?

Look for cross‑threaded or flattened threads, a nut that won’t torque smoothly, a stud that spins in the hub, or visible stretch/cracks. Red rust and pitting around the threads are also warnings.

Replace damaged parts immediately and check the rest on that hub. If multiple studs are failing, inspect the hub flange and wheel seating surfaces for damage.