If you own a Subaru Impreza, knowing the proper lug nut size and torque specifications is important for changing a tire or replacing wheels. The lug nuts help secure the wheels to the vehicle’s hub assembly. Using the wrong size lug nuts or improperly torquing them can lead to a wheel coming loose while driving, a serious safety hazard. In this article, we’ll look at what size lug nuts Subaru Imprezas use and the recommended tightening torque.

Subaru Impreza lug nut size

The lug nuts on most Subaru Imprezas, including the WRX and WRX STI models, are 12×1.25 mm conical lug nuts with a 60-degree tapered seat. Always check your owner’s manual or factory service manual to verify the lug nut size for your specific Impreza.

Aftermarket wheels or hubs may also use different lug nuts, so check for the correct size if you’ve modified your Impreza. The most common OEM Subaru Impreza lug nut sizes are:

  • 12 x 1.25 mm – 60° taper (most models)

The “12” refers to the diameter which is 12mm. The “1.25”  indicates the thread pitch in millimeters. And 60° is the tapered angle of the lug nut seat.

Subaru Impreza lug nut Socket size

To remove or install Subaru Impreza lug nuts, you’ll need a socket that properly fits the lug nut size. For 12×1.25 lug nuts, the correct socket size is 19mm.

It’s important to use a socket that precisely matches the lug nut size. An improperly sized socket can round off the corners of the lug nuts making them extremely difficult to remove. Most lug nut sockets have 6 points or flutes on the inside that match the 6 corners of the lug nut.

Quality steel sockets are best to avoid wear and rounding of the points. The socket should fit snugly onto the lug nut without wiggle room. And you’ll need a socket wrench or breaker bar with enough leverage to loosen and tighten the lug nuts adequately.

Proper torque specifications for Subaru Impreza lug nut

Along with the proper socket size, using the recommended torque spec for tightening lug nuts is critical. Under-torqued lug nuts can vibrate loose while over-tightening can damage the wheel studs or rotor hat.

The factory torque specification for most Subaru Impreza models is 80 ft-lbs. Some performance models like the WRX STI or special wheel packages may call for slightly higher or lower torque. Always check the vehicle owner’s manual for the exact lug nut torque spec.

After changing a flat, the wheel lug nuts should be torqued in a star pattern sequence to ensure even tightening. And the torque should be verified with a torque wrench after test driving a short distance and allowing the wheel to fully seat.

Some Subaru Impreza owners choose to install locking lug nuts which require a special key tool for removal. This makes the wheels much less susceptible to theft. But even with locking lug nuts, use the proper 19mm socket size and torque spec mentioned above.

Just be sure to keep the locking lug nut key stored safely since you’ll need it for tire changes and maintenance.

What size are Subaru Impreza lug nuts?

Why choose BONOSS Subaru Impreza lug nuts?

Upgrading to high-quality aftermarket lug nuts like BONOSS can improve reliability and security. Here are some benefits of choosing BONOSS steel lug nuts for your Subaru Impreza.

  • Precisely machined for accurate fit and proper torque
  • Made from hardened steel for strength and durability
  • Corrosion-resistant black specially processed finish
  • Offered in conical lug nut options
  • Reputable quality backed by BONOSS limited 10-year warranty

With precise manufacturing tolerances and robust construction, BONOSS lug nuts are a wise upgrade over factory nuts. They install easily with standard hand tools and offer peace of mind that your Subaru Impreza wheels will stay securely fastened. Considering how critical your lug nuts are, invest in the best with BONOSS.

Knowing the proper 12×1.25mm size and 80 ft-lb torque spec for Subaru Impreza lug nuts is crucial anytime you change a tire or wheel. Use a quality 19mm socket and torque wrench to avoid problems. And consider upgrading to durable aftermarket lug nuts like BONOSS for optimal security and performance. With the right tools and procedure, you can keep your Impreza wheels safely attached for the long haul.