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Home >> Subaru >> 2022 >> WRX Premium, Standard Trans >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Brake System >> Rear Disc Rotor >> Inspection >> Disc Rotor Thickness Check

Disc Rotor Thickness Check

  1. Remove the caliper body. Ref. to BRAKE>REAR DISC BRAKE ASSEMBLY>REMOVAL .
  2. Set a micrometer 10 mm (0.39 in) inward from the brake disc rear outer perimeter, and then measure the disc rotor thickness (a).
    G14602210Courtesy of SUBARU OF AMERICA, INC.
    • Except for the electronic parking brake model
      Value in a brand-new state Wear limit
    Disc rotor thickness 18 mm (0.71 in) 16 mm (0.63 in)
    • Electronic parking brake model
      Value in a brand-new state Wear limit
    Disc rotor thickness 17 mm (0.67 in) 15 mm (0.59 in)
  3. If the wear limit is exceeded in the inspection, replace the brake disc rear.