Parts for your 2017 Subaru Impreza-Wheel studs nuts

2017 Subaru Impreza wheelstudsnuts — what they do and how to look after them

The 2017 Subaru Impreza is fitted with wheel studs and nuts (wheelstudsnuts), not wheel bolts. This is confirmed by Subaru’s own technical literature: the 2017MY Impreza Owner’s Manual specifies a wheel nut tightening torque of 120 N·m, and the Subaru Service Manual (STIS) shows pressed-in wheel studs on the hub with separate wheel nuts. So yes — wheelstudsnuts are relevant and used on this model.

On this Impreza, five studs are pressed into each hub, and the wheel is secured with five matching nuts. The setup makes wheel changes quicker, helps centre the wheel on the hub, and provides reliable clamping force when torqued correctly. Subaru uses an M12 × 1.25 thread with a 60-degree tapered seat on the nut for most factory wheels, and the platform runs a 5 × 100 PCD hub pattern.

For everyday servicing, the goal is simple: keep the clamping force consistent and the threads healthy. A few easy habits go a long way:

• Use a torque wrench and tighten to 120 N·m in a star pattern. Avoid hammering them on with a rattle gun.
• Re-torque after 50–100 kilometres any time a wheel’s been off, especially after tyre rotations or brake work.
• Keep threads clean and dry — no oil, grease, or anti-seize on studs or nuts, as lubrication can over-stretch studs and change torque readings.
• Inspect the tapered seats on the nuts and the wheel for galling or fretting, replace damaged nuts.

Signs the Impreza may need new studs or nuts include a nut that won’t hold torque, visibly stretched or cross‑threaded studs, damaged taper seats, or rust pitting on coastal cars. If a stud spins in the hub, or a nut goes tight and then loose, it’s time to replace the affected parts.

Stud replacement is straightforward but precise: the hub is supported, the damaged stud is pressed out, and a new OEM‑spec stud is pulled in square using a spacer and a sacrificial nut, or pressed with the hub off-car. Mixing thread pitches or seat types is a no-go, stick with the correct M12 × 1.25 and the proper 60‑degree taper to suit the wheel. When in doubt, check the Owner’s Manual torque spec and the Subaru Service Manual procedures — they’re the baseline for safe, even clamping.

• What’s the correct wheel nut torque for a 2017 Subaru Impreza?
  The factory spec is 120 N·m. Tighten in a star pattern and re-check after 50–100 kilometres of driving.
• Does the 2017 Impreza use studs and nuts or bolts?
  It uses studs and nuts — five per wheel. Subaru’s Service Manual shows pressed-in studs with separate nuts.
• When should wheel studs or nuts be replaced?
  There’s no set interval, replace if threads are damaged, studs are stretched or spinning, or nut seats are chewed out or rusty.