2024 Subaru Impreza BaseFACTORY OEM SERVICE PROCEDURE

Fuel Injector: Replacement

  1. Remove the fuel injector holder.
    • 2.0 L model
    G16760477Courtesy of SUBARU OF AMERICA, INC.
    • 2.5 L model
    G16760478Courtesy of SUBARU OF AMERICA, INC.
  2. Remove the C-ring (A) and slider washer (B).
    G16760495Courtesy of SUBARU OF AMERICA, INC.
  3. Remove the stopper ring (A), O-ring seal (B) and backup ring (C).
    G16523288Courtesy of SUBARU OF AMERICA, INC.
  4. Gradually expand the fuel injector seal and remove the fuel injector seal.
    CAUTION:
    • Be careful not to apply too much force when pinching the fuel injector seal, or the fuel injector groove may be damaged  .
    • If the tip of the fuel injector assembly is hit or the assembly is dropped, replace the fuel injector assembly with a new part  .
    G16523289Courtesy of SUBARU OF AMERICA, INC.
  5. Install the fuel injector seal.
    1. Remove carbon from area (A) shown in the figure (sides of fuel injector and the seal groove).
      CAUTION:
      • Do not attempt to clean the tip  .
      • Do not use a wire-brush  .
      • If the tip of the fuel injector assembly is hit or the assembly is dropped, replace the fuel injector assembly with a new part  .
      G16523290Courtesy of SUBARU OF AMERICA, INC.
    2. Set the ST1 on the fuel injector so that the tapered side (A) (with ST number printed) faces toward the tip of the fuel injector.

      Preparation tool  :

      ST1: ADJUSTER (18271AA020) 

      G16760499Courtesy of SUBARU OF AMERICA, INC.
    3. Install new fuel injector seal (A) on ST2.
      CAUTION: When setting the fuel injector seal on the ST2, be careful not to set it obliquely, or the seal is stretched and become hard to be fixed.
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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.