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Front Oxygen (A/F) Sensor: Removal

  1. Disconnect battery ground cable.
    Fig 1: Disconnecting Battery Ground Cable
    G02959768Courtesy of SUBARU OF AMERICA, INC.
  2. Disconnect connector from front oxygen (A/F) sensor.
    Fig 2: Disconnecting Connector From Front Oxygen (A/F) Sensor
    G02959769Courtesy of SUBARU OF AMERICA, INC.
  3. Lift-up the vehicle.
  4. Apply SUBARU CRC or its equivalent to threaded portion of front oxygen (A/F) sensor, and leave it for one minute or more.
    1. SUBARU CRC (Part No. 004301003) 
  5. Remove front oxygen (A/F) sensor.
    CAUTION: When removing the oxygen (A/F) sensor, wait until exhaust pipe cools, otherwise it will damage exhaust pipe. 
    Fig 3: Removing Front Oxygen (A/F) Sensor
    G02959770Courtesy of SUBARU OF AMERICA, INC.
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