2015 Subaru Outback 3.6R LimitedFACTORY OEM SERVICE PROCEDURE

Knock Sensor: Removal

  1. Remove the collector cover.
    1. Carefully pull up the rear of collector cover at two positions (A).
    2. Carefully pull up the front of collector cover at two positions (B) while moving it forward.
      Fig 1: Locating Rear And Front Collector Cover Positions
      G10263528Courtesy of SUBARU OF AMERICA, INC.
  2. Disconnect the ground terminal from battery sensor. <Ref. to BATTERY , NOTE, Repair Contents.>
  3. Remove the intake manifold. <Ref. to REMOVAL , Intake Manifold.>
  4. Disconnect the connector (A) from the knock sensor, and remove the knock sensor from the cylinder block.
    Fig 2: Locating Knock Sensor Connector Bolts
    G10263585Courtesy 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.