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Home >> Subaru >> 2022 >> WRX Base, Automatic CVT Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System >> Rear Oxygen Sensor >> Installation
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Rear Oxygen Sensor: Installation

CAUTION:

If lubricant is spilt over the exhaust pipe, wipe it off with cloth to avoid emission of smoke or causing a fire. 

  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. 

    Preparation items: 

    Anti-seize compound: NEVER-SEEZ NSN, JET LUBE SS-30 or equivalent

  2. Install the rear oxygen sensor and connect the connector.
    CAUTION:

    Do not cross the rear oxygen sensor harness with the ground cord during installation. 

    Tightening torque: 

    30 N.m (3.1 kgf-m, 22.1 ft-lb)

  3. Install the under cover front. Ref. to EXTERIOR/INTERIOR TRIM>FRONT UNDER COVER>INSTALLATION
  4. Lower the vehicle.
  5. Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY
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