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Home >> Subaru >> 2021 >> Legacy Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (2.5L) >> Knock Sensor >> Removal >> LH Side
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LH Side

  1. Disconnect the ground terminal from battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
  2. Remove the clip from the air intake boot, and loosen the clamp.
    G13947207Courtesy of SUBARU OF AMERICA, INC.
  3. Remove the air intake boot, and place it aside so that it does not interfere with the work.
    CAUTION: Be careful not to pull out the PCV hose.
    G13947208Courtesy of SUBARU OF AMERICA, INC.
  4. Remove the intake manifold assembly. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>INTAKE MANIFOLD ASSEMBLY>REMOVAL .
  5. Disconnect the connector (A).
  6. Remove the bolt securing the engine ground and the harness case, and remove the clip (B).
  7. Remove the bolts securing the engine wiring harness stay, and remove the engine wiring harness stay.
  8. Disconnect the connector (C) and remove the clip (D) and clip (E).
    G13947209Courtesy of SUBARU OF AMERICA, INC.
  9. Remove the knock sensor together with the coupling harness using a claw-foot wrench.
    G13947210Courtesy of SUBARU OF AMERICA, INC.
  10. Disconnect the coupling harness.
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