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Home >> Subaru >> 2017 >> Outback 3.6R Limited >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (H6DO) >> Front Oxygen (A/F) Sensor >> Removal
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Front Oxygen (A/F) Sensor: Removal

  1. Disconnect the ground terminal from battery sensor. <Ref. to BATTERY , NOTE, Repair Contents.>
  2. Lift up the vehicle.
  3. Disconnect the connector (A) of the front oxygen (A/F) sensor.
  4. Remove the clip (B) securing the front oxygen (A/F) sensor harness. (LH side only)
  5. Apply spray-type lubricant (004301003) or equivalent to the threaded portion of front oxygen (A/F) sensor, and leave it for one minute or more.
  6. Remove the front oxygen (A/F) sensor.
    CAUTION: When removing the front oxygen (A/F) sensor, wait until exhaust pipe cools, otherwise it will damage the exhaust pipe.
    • RH side
      Fig 1: Front Oxygen (A/F) Sensor Connector - RH Side
      G10263626Courtesy of SUBARU OF AMERICA, INC.
    • LH side
    Fig 2: Front Oxygen (A/F) Sensor Connector And Harness Clip - LH Side
    G10263627Courtesy of SUBARU OF AMERICA, INC.
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