Parts for your 2006 Subaru Impreza-Wheel studs nuts

2006 Subaru Impreza wheelstudsnuts — what they do and how to look after them

Technical sources confirm the 2006 Subaru Impreza uses wheel studs and nuts (wheelstudsnuts), not wheel bolts. The Subaru Factory Service Manual for MY2006 Impreza (GD/GG) in the Wheels & Tyres section specifies wheel nuts fitted to pressed-in hub studs, and Subaru’s FAST electronic parts catalogue lists the hub “stud—wheel” and “nut—wheel, M12×1.25” for this model. General repair references such as the Haynes Subaru Impreza 2002–2011 also illustrate the same stud-and-nut arrangement.

On a 2006 Subaru Impreza, the wheelstudsnuts clamp the wheel firmly to the hub so the brake discs and bearings do their job without any wobble or noise. The studs are pressed into the hub and the tapered nuts centre and hold the alloy or steel rim. Kept in good nick, they deliver even clamping force, smooth braking, and a drama-free WOF/roadworthy.

As part of regular servicing, the big wins are cleanliness, correct torque, and condition checks. Always fit clean, dry threads and seat faces—no oil, copper slip, or anti-seize on the studs or under the nut taper. That keeps torque readings honest and prevents over-stretching. Nuts should be tightened in a star pattern using a calibrated torque wrench to the factory spec in the owner’s manual, then rechecked after a short shakedown (about 50–100 km) any time a wheel’s been off.

Inspection is quick: look for rusty or pitted studs, flattened or torn threads, and nuts with chewed tapers or swollen caps. If a nut runs gritty or won’t spin by hand for the first few turns, stop—chasing a cross-thread will only make it worse. Replace any suspect item as a set on that corner if wear is uneven, and always match the correct seat style and thread pitch (Subaru is M12×1.25). Pressed-in studs that spin or have damaged splines should be replaced promptly, it’s a straightforward hub-off job with a press, or hub-on with suitable tools if access allows.

Good habits pay off: swap wheels with a torque wrench, avoid rattle guns for final tightening, and never drive with a missing nut or broken stud. It protects the hub, keeps tyres wearing evenly, and helps the Impreza feel tight and tidy on Aussie and Kiwi roads.

• Clean, dry threads and seats only—no lubricants
• Tighten in a star pattern with a torque wrench to factory spec
• Re-torque after 50–100 km post wheel-off work
• Replace damaged studs/nuts and match M12×1.25 hardware

Popular question: What torque should the wheel nuts be tightened to on a 2006 Subaru Impreza?

They should be tightened to the factory specification in the owner’s manual or service manual. Use a torque wrench and a star pattern, and avoid lubricants on threads or seat faces so the clamping force is accurate. If the exact figure isn’t at hand, ask a Subaru specialist or check a reputable data source before proceeding.

After any wheel-off job, re-check torque after 50–100 km to account for any settling. Avoid hammering them home with a rattle gun—use it only to snug if needed, then final-torque by hand.

Popular question: How can someone tell a wheel stud or nut needs replacing on a 2006 Subaru Impreza?

Look for stretched or rolled threads, cross-threading scars, rust pitting, damaged tapers, or a stud that spins in the hub. A nut that won’t start by hand for a few turns is a red flag.

Replace with the correct M12×1.25 hardware and match the seat style to the wheel. If a stud is broken or spinning, it should be pressed out and a new one installed promptly to avoid wheel and hub damage.

Popular question: Is it safe to drive with one broken wheel stud on an Impreza?

It’s not recommended. Missing clamping force can let the wheel fret against the hub, which can oval the wheel holes, stress the remaining studs, and fail a WOF/roadworthy. Get the stud replaced as soon as practical.

If driving absolutely can’t be avoided, keep speed low and distance short, then repair immediately. Better yet, fix it before hitting the road.