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Home >> Subaru >> 2006 >> Forester X, Automatic >> 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 rear oxygen sensor, apply the anti-seize compound only to the threaded portion of rear oxygen sensor to make the next removal easier.
    CAUTION: Never apply anti-seize compound to the protector of rear oxygen sensor.

    Anti-seize compound: NEVER-SEEZ NS-165 or the equivalent 

  2. Install the rear oxygen sensor.

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

    Fig 1: Identifying Rear And Front Oxygen (A/F) Sensor
    G04992297
  3. Install the under cover.
  4. Lower the vehicle.
  5. Connect the connector to rear oxygen sensor and mount the harness clips to the bracket for fastening.
    Fig 2: Identifying Rear And Front Oxygen (A/F) Sensor Connector
    G04992298
  6. Connect the ground cable to battery.
Fig 3: Disconnecting Battery Ground Cable
G04988132