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Front Oxygen (A/F) Sensor: Installation

  1. Before installing front oxygen (A/F) sensor, apply anti-seize compound only to the threaded portion of front oxygen (A/F) sensor to make the next removal easier.

    Anti-seize compound: 

    SS-30 by JET LUBE 

    CAUTION: Never apply anti-seize compound to protector of front oxygen (A/F) sensor.
  2. Install the front oxygen (A/F) sensor.

    Tightening torque: 

    30 N.m (3.1 kgf-m, 22.1 ft-lb) 

    Fig 1: Identifying Front Oxygen Sensor
    G04998396Courtesy of SUBARU OF AMERICA, INC.
  3. Install the service hole cover.
    Fig 2: Identifying Service Hole Cover
    G04998395Courtesy of SUBARU OF AMERICA, INC.
  4. Lower the vehicle.
  5. Install the front right side wheel.
  6. Connect the engine harness using clips (A).
    Fig 3: Identifying Engine Harness Clips
    G04989122Courtesy of SUBARU OF AMERICA, INC.
  7. Connect the connector of front oxygen (A/F) sensor.
    Fig 4: Identifying Front Oxygen (A/F) Sensor
    G04989121Courtesy of SUBARU OF AMERICA, INC.
  8. Connect the battery ground cable to battery.
    Fig 5: Disconnecting Ground Cable From Battery
    G04988132Courtesy of SUBARU OF AMERICA, INC.