2021 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

Engine Starting System & Charging System (2.0L): Generator: Disassembly

  1. Remove the cap from the generator.
    G09476745Courtesy of SUBARU OF AMERICA, INC.
  2. Remove the four through bolts.
    G09476746Courtesy of SUBARU OF AMERICA, INC.
  3. Use a drier to heat the rear cover (A) portion to 50 - 60°C (122 - 140°F).
    G09476747Courtesy of SUBARU OF AMERICA, INC.
  4. Insert a flat tip screwdriver or similar tool wrapped with protective tape into the gap between stator core and the front cover to disassemble.
    G13642415Courtesy of SUBARU OF AMERICA, INC.
  5. Hold the rotor on a vise and remove the pulley.
    CAUTION: When holding the rotor with a vise, place aluminum plates or wooden pieces on the vise jaws to prevent rotor from damage.
    G09476749Courtesy of SUBARU OF AMERICA, INC.
  6. Remove the rotor from the front cover.
    G13642417Courtesy of SUBARU OF AMERICA, INC.
  7. Use the following procedures to remove the ball bearings.
    1. Remove the bolt, and then detach the bearing retainer.
      G09476751Courtesy of SUBARU OF AMERICA, INC.
    2. Firmly attach an appropriate tool (such as a correct size socket wrench) to the bearing inner race.
      G09476752Courtesy of SUBARU OF AMERICA, INC.
    3. Use the press to push the ball bearings out from the front cover.
  8. Using the bearing puller, remove the bearings from the rotor.
    G09476753Courtesy of SUBARU OF AMERICA, INC.
  9. Remove six bolts which connect the rectifier and stator coil, then remove the stator coil.
    G09476754Courtesy of SUBARU OF AMERICA, INC.
  10. Remove four screws which secure the IC regulator to the rear cover, then remove the IC regulator.
    G09476755Courtesy of SUBARU OF AMERICA, INC.
  11. Use the following procedures to remove the brush.
    1. Remove the cover A.
      G13642423Courtesy of SUBARU OF AMERICA, INC.
    2. Remove the cover B.
      G11566958Courtesy of SUBARU OF AMERICA, INC.
    3. Disconnect the connection and remove the brush.
    G07665189Courtesy of SUBARU OF AMERICA, INC.
  12. Remove the rectifier as follows.
    1. Remove the cover on terminal B.
      G09476759Courtesy of SUBARU OF AMERICA, INC.
    2. Remove the nut on terminal B.
      G13642427Courtesy of SUBARU OF AMERICA, INC.
    3. Remove the bolts which secure the rectifier, and remove the rectifier.
G09476761Courtesy of SUBARU OF AMERICA, INC.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.