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Home >> Subaru >> 2005 >> Impreza Outback Sport, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection (Fuel Systems) -- H4SO >> Rear Oxygen Sensor >> Installation

Rear Oxygen Sensor: Installation

  1. Before installing the rear oxygen (A/F) sensor, apply the anti-seize compound only to the threaded portion of the rear oxygen (A/F) sensor to make the next removal easier.
    CAUTION: Never apply anti-seize compound to protector of front oxygen (A/F) sensor.

    Anti-seize compound: 

    SS-30 by JET LUBE 

    Fig 1: Applying Anti-Seize Compound Only To Threaded Portion Of Rear Oxygen (A/F) Sensor
    G03812659Courtesy of SUBARU OF AMERICA, INC.
  2. Install the rear oxygen sensor.

    Tightening torque: 

    21 N.m (2.1 kgf-m, 15.2 ft-lb) 

    Fig 2: Installing Rear Oxygen Sensor
    G03812660Courtesy of SUBARU OF AMERICA, INC.
  3. Lower the vehicle.
  4. Connect the connector to the rear oxygen sensor.
    NOTE: Install the harness clip to bracket.
    Fig 3: Connecting Connector To Rear Oxygen Sensor
    G03812661Courtesy of SUBARU OF AMERICA, INC.
  5. Connect the battery ground cable to battery.
    Fig 4: Connecting Battery Ground Cable To Battery
    G03812662Courtesy of SUBARU OF AMERICA, INC.