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Home >> Subaru >> 2018 >> Outback 2.5i >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control/Fuel System (H4DO) >> Rear Oxygen Sensor >> Removal
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Rear Oxygen Sensor: Removal

  1. Disconnect the ground terminal from battery sensor. Ref. to REPAIR CONTENTS>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.
    G12403332Courtesy of SUBARU OF AMERICA, INC.
  5. Remove the front mud guard RH. Ref. to EXTERIOR/INTERIOR TRIM>Mud Guard>REMOVAL
  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.
    G10262203Courtesy of SUBARU OF AMERICA, INC.
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