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Rear Oxygen Sensor: Removal

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the ground cable from battery.
    Fig 1: Disconnecting Ground Cable From Battery
    G07664775Courtesy of SUBARU OF AMERICA, INC.
  2. Lift up the vehicle.
  3. Remove the under cover RH. < Ref. to REMOVAL , Front Under Cover. >
  4. Disconnect the rear oxygen sensor connector.
    Fig 2: Front Oxygen (A/F) Sensor Connector And Rear Oxygen Sensor Connector
    G07664776Courtesy of SUBARU OF AMERICA, INC.
  5. Apply spray-type lubricant 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 3: Locating Rear Oxygen Sensor
    G07664777Courtesy of SUBARU OF AMERICA, INC.
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