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Rear Oxygen Sensor: Removal

WARNING: This page is about a different variant/trim than selected.
  1. Disconnect the ground terminal from battery sensor. Ref. to NOTE>NOTE>BATTERY .
  2. Lift up the vehicle.
  3. Remove the under cover. Ref. to EXTERIOR/INTERIOR TRIM>Front Under Cover>REMOVAL .
  4. Disconnect the rear oxygen sensor connector.
    Fig 1: Identifying Rear Oxygen Sensor Connector And Clip
    G11263379Courtesy of SUBARU OF AMERICA, INC.
  5. Apply spray-type lubricant (004301003) or equivalent to the threaded portion of rear oxygen sensor, and leave it for one minute or more.
  6. Remove the rear oxygen sensor.
    CAUTION: When removing the rear oxygen sensor, wait until exhaust pipe cools, otherwise it will damage the exhaust pipe.
    Fig 2: Locating Rear Oxygen Sensor
    G10262203Courtesy of SUBARU OF AMERICA, INC.
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