Parts for your 2008 Subaru Outback-Wheel studs nuts

2008 Subaru Outback wheel studs and nuts

Yes, wheel studs and nuts are absolutely used on the 2008 Subaru Outback. Subaru’s factory service information and parts catalogues for the BP/BL Outback list pressed-in wheel studs on each hub with matching conical-seat wheel nuts (typically M12 x 1.25 thread, 5-stud, 5x100 PCD). This model does not use wheel bolts.

On this Outback, the wheel studs are the threaded pins pressed into the hub flange, and the wheel nuts clamp the wheel to the hub. Together they handle the clamping force that keeps the wheel seated snug against the hub face while the studs themselves locate the wheel via the hub-centric design. Correct clamping is critical for smooth driving, proper brake rotor alignment, and avoiding vibration or wheel-off incidents.

For servicing, the key is clean, correct, and consistent clamping. Subaru specifies tightening the wheel nuts in a star pattern with a torque wrench to around 120 N·m (dry threads). Don’t lubricate the studs or use anti-seize, as that alters friction and can lead to over‑torque. After tyre rotations or wheel refits, it’s smart practice to recheck torque after 50–100 km.

• Start all nuts by hand to avoid cross-threading. If a nut won’t spin on cleanly by hand, stop and inspect the threads.
• Keep the hub face and wheel mating surfaces clean and free of rust scale. A light scrub with a nylon or brass brush is fine.
• Avoid hammering impact guns at full tilt, if using one, only for removal or low‑power snugging, then finish with a torque wrench.
• Watch for warning signs: a nut that never reaches torque, a stud that spins in the hub, visible thread damage, or stretched studs (threads look “pulled”).

Damaged studs should be replaced—each is a press-in part. Replacement typically involves removing the brake caliper and rotor, pressing or drawing the old stud out, and installing a quality replacement to the proper seat. Replace any nut with damaged threads or a deformed seat. If you run aftermarket wheels, confirm the seat type is 60° conical to match OEM Subaru specs and that the nut hex suits your factory wheel brace (commonly 19 mm). Getting these basics right keeps the Outback tracking straight, the brakes happy, and the family safe on those long Kiwi or Aussie road trips.

Popular questions about 2008 Subaru Outback wheel studs and nuts

What size are the wheel studs and nuts on a 2008 Outback?
The 2008 Subaru Outback uses M12 x 1.25 studs with 60° conical-seat nuts on a 5x100 bolt pattern. Most OEM nuts have a 19 mm hex and are closed-end. The hub centre bore is about 56.1 mm, so the wheel is hub-centric and the studs provide clamping.

What’s the correct torque for the wheel nuts?
Tighten the wheel nuts to about 120 N·m on clean, dry threads using a star pattern. Don’t oil the studs or use anti-seize, as that changes the friction and can over‑tighten the joint. After tyre service, recheck torque after 50–100 km.

Can individual wheel studs be replaced?
Yes. A single damaged stud can be pressed out and a new one pressed in. The job usually needs the caliper and rotor off for access. If multiple studs are damaged or the hub bore is wallowed, assess the hub for replacement. Always fit quality studs and matching conical-seat nuts.