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Home >> Subaru >> 2005 >> Forester XS, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection - Fuel Systems (H4SO) >> Rear Oxygen Sensor >> Installation
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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 rear oxygen sensor.

    Anti-seize compound: 

    SS-30 JET LUBE 

    Fig 1: Applying Anti-Seize Compound To Threaded Portion Of Rear Oxygen (A/F) Sensor
    G03805285Courtesy 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
    G03805286Courtesy of SUBARU OF AMERICA, INC.
  3. Lower the vehicle.
  4. Connect the connector to the rear oxygen sensor, and then install the harness clip to securing bracket.
    Fig 3: Connecting Connector To Rear Oxygen Sensor
    G03805287Courtesy of SUBARU OF AMERICA, INC.
  5. Connect the battery ground cable to battery.
    Fig 4: Connecting Battery Ground Cable To Battery
    G03805288Courtesy of SUBARU OF AMERICA, INC.