Parts for your 2009 Subaru Outback-Wheel studs nuts

2009 Subaru Outback wheel studs and nuts: what they do and how to look after them

Technical sources confirm the 2009 Subaru Outback uses wheel studs with separate wheel nuts (not wheel bolts). The Subaru Owner’s Manual (tyre changing section), the Factory Service Manual for the 2005–2009 Legacy/Outback platform (Wheel and Hub sections), and Subaru’s parts catalogues all specify a pressed-in wheel stud on the hub and a separate conical-seat wheel nut as the service fastening. Typical specs are a 5-stud hub using M12 x 1.25 studs with a 60° taper nut and a tightening torque of about 120 N·m.

On a 2009 Subaru Outback, the wheel studs are pressed into the hub flange and the wheel nuts clamp the wheel and brake rotor hat securely to the hub. It’s a simple, tough setup that lets tyres be swapped quickly while keeping clamping force consistent. Subaru specifies a dry torque of roughly 120 N·m for the wheel nuts, tightened in a star pattern.

As part of routine servicing or any tyre rotation, it’s smart to inspect the studs and nuts. Look for dinged or flattened threads, rust pitting, stretched studs (threads necked or elongated), and nuts with damaged conical seats. If a nut feels gritty or binds while winding on by hand, stop—cross-threading will write off the stud. Replace any suspect studs or nuts straight away.

A few best-practice tips keep things sweet:

• Tighten nuts dry—no oil or anti-seize on the threads or cone seat, as Subaru service literature warns this can overstate torque and reduce clamping.
• Use the correct 60° taper nuts, wrong-seat nuts (e.g., mag or ball seat) won’t centre the wheel properly.
• Avoid smashing them home with a rattle gun. Use an impact only to snug, then finish with a torque wrench to 120 N·m.
• After any wheel-off job, recheck torque after 50–100 km of driving.

Replacing a stud is straightforward but does need care. With the wheel and brake hardware off, the damaged stud is driven or pressed out from the rear of the hub. The new stud is drawn in squarely until the head seats fully against the hub—ideally with a press, or by hand tools using a stack of flat washers and a sacrificial nut. Don’t yank it in with an impact, as you can gall the new threads or leave the head under-seated. If several studs show damage, replacing the set on that hub is cheap insurance.

Common red flags are a wheel that won’t stay torqued, clicking under load, visible wobble, or any stud that spins in the hub. Sort it early to protect the hub and the brakes—and to keep the Outback safe on Aussie and Kiwi roads.

Popular questions about 2009 Subaru Outback wheel studs and nuts

What’s the correct torque for the wheel nuts on a 2009 Outback?
Subaru specifies about 120 N·m for the wheel nuts on this model. Tighten in a star pattern on a clean, dry stud and cone seat, then recheck after 50–100 km of driving. That keeps the clamping force even and helps prevent rotor distortion.

Should anti-seize be used on Subaru wheel studs?
No. Subaru service guidance calls for dry threads and dry cone seats. Lubricants or anti-seize reduce friction and can lead to over-tightening at the same torque setting, which risks stretching studs and distorting rotors.

How can someone tell if a stud or nut needs replacing?
If a nut won’t spin on smoothly by hand, threads look rolled or torn, the cone seat is chewed up, or there’s obvious rust pitting, replace it. A stretched stud often shows necking near the thread run-up. Any snapped, spinning, or cross-threaded stud should be changed immediately.