Parts for your 1990 Nissan Primera-Wheel studs nuts

1990 Nissan Primera wheel studs and nuts — purpose, care and when to replace

On the 1990 Nissan Primera (P10), the wheels are secured with pressed-in wheel studs and separate tapered wheel nuts — not bolts. This is documented in the Nissan Primera (P10) Factory Service Manual (Wheel & Tyre/WT section), the Nissan FAST electronic parts catalogue for early P10 models, and mainstream repair guides such as the Haynes manual for Nissan Primera 1990s models. Those sources specify four-stud hubs (4×100 PCD) using M12 × 1.25 studs and matching conical-seat nuts.

These studs and nuts do a simple but critical job: they clamp the wheel firmly to the hub so the wheel centres properly and stays put through braking, cornering, and bumps. The studs carry the clamping load while the hub’s centre bore locates the wheel. Because the Primera uses separate studs and nuts, roadside wheel changes are straightforward and thread damage is isolated to individual studs rather than the entire hub.

During regular servicing, it’s smart to give the studs and nuts a once-over. Look for crossed or stretched threads, corrosion, or nuts with rounded hexes. If a wheel’s been rattled on with a rattle gun for years, the threads can get tired. Replace any suspect studs or nuts as a set on that wheel to keep clamping even. Stick with the correct thread (M12 × 1.25) and a 60° taper seat to suit factory wheels, mixing mag-seat or ball-seat nuts with tapered seats can lead to loosening or warped rotors.

Refitting is about cleanliness and correct torque. Brush off dirt and rust, keep threads dry (no oil or anti-seize, as it changes torque), and tighten the nuts in a star pattern. For many P10 variants, workshop data lists wheel nut torque around the 98–108 N·m mark — always confirm in the factory manual for your exact trim. After any wheel-off work, recheck torque after 50–100 km.

Replacing a damaged stud is a straightforward workshop job: remove the wheel and brake (disc or drum as fitted), knock the old stud out from the back, and pull the new stud into the hub flange squarely using a stack of washers and a sacrificial nut or a press. Watch ABS tone rings where fitted and ensure the stud head seats flat. If clearance is tight, the hub may need to come off.

• Signs they need attention:
  • Clicking or clunking after a tyre rotation
  • Visible thread damage, rust pitting, or spinning studs
  • Wheel nuts that won’t hold torque or have deformed caps
• Service tips:
  • Use a torque wrench, not just a rattle gun
  • Match seat type to the wheel, check spare-wheel nuts if different
  • Replace any stretched or over-tightened hardware promptly

Popular questions

What size are the wheel nuts on a 1990 Nissan Primera?
They’re M12 × 1.25 thread with a 60° conical seat, typically using a 21 mm hex. That fine-pitch thread is standard across many Nissans of the era, so stick with the correct pitch to avoid cross-threading and poor clamping.

What torque should the wheel nuts be tightened to?
Workshop references for P10 models commonly quote around 98–108 N·m. Use a star pattern, torque in stages, and recheck after 50–100 km. If you don’t have the exact spec for your trim, refer to the factory service manual and err on the lower end rather than over-tightening.

How do you replace a broken wheel stud on a P10 Primera?
Remove the wheel, caliper and rotor (or drum), knock the damaged stud out from the rear of the hub, then draw in a new stud squarely using washers and a nut or a press. Ensure clearance for the stud head, if the backing plate or knuckle blocks it, remove the hub. Finish with correct torque on the nuts and a road-test followed by a re-torque.