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Rear Oxygen Sensor: Removal

WARNING: This page is about a different car, the 2016 Subaru Outback and 2016 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the ground terminal from battery sensor. < Ref. to BATTERY , NOTE, Repair Contents. >
  2. Lift up the vehicle.
  3. Remove the under cover. < Ref. to REMOVAL , Front Under Cover. >
  4. Disconnect the rear oxygen sensor connector.
    Fig 1: Identifying Front (A/F) And Rear Oxygen Sensor Connector
    G10307923Courtesy of SUBARU OF AMERICA, INC.
  5. Remove the front mud guard RH. < Ref. to REMOVAL , Mud Guard. >
  6. Apply spray-type lubricant (004301003) or equivalent to the threaded portion of rear oxygen sensor, and leave it for one minute or more.
  7. 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 Bolt
    G10262203Courtesy of SUBARU OF AMERICA, INC.
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