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Home >> Subaru >> 2006 >> Forester X, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection (Fuel Systems) (H4SO) >> Front Oxygen (A/F) Sensor >> Installation

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: 

    NEVER-SEEZ NS-165 or the equivalent 

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

    Tightening torque: 21 N.m (2.1 kgf-m, 15.2 ft-lb) 

    Fig 1: Identifying Front Oxygen (A/F) Sensor And Rear Oxygen Sensor
    G04992291
  3. Install the under cover.
  4. Lower the vehicle.
  5. Connect the connector of front oxygen (A/F) sensor connector and fasten the harness with clips.
    Fig 2: Identifying Front Oxygen (A/F) Sensor And Rear Oxygen Sensor Connector
    G04992292
  6. Connect the ground cable to battery.
Fig 3: Disconnecting Battery Ground Cable
G04988132
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