2020 Subaru Outback BaseFACTORY OEM SERVICE PROCEDURE

LH Side

  1. Disconnect the ground terminal from battery sensor. Refer to REPAIR CONTENTS>NOTE>BATTERY .
  2. Remove the clip from the air intake boot, and loosen the clamp.
    G13618350Courtesy 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.
    G13618351Courtesy of SUBARU OF AMERICA, INC.
  4. Remove the intake manifold assembly. Refer 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).
    G13223970Courtesy of SUBARU OF AMERICA, INC.
  9. Remove the knock sensor together with the coupling harness using a claw-foot wrench.
    G13223971Courtesy of SUBARU OF AMERICA, INC.
  10. Disconnect the coupling harness.
Factory Service Tools

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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.

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