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Home >> Subaru >> 2021 >> Crosstrek Base, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (Except For HEV) >> Rear Oxygen Sensor >> Installation
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Rear Oxygen Sensor: Installation

CAUTION: If lubricant is spilled 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.

    Anti-seize compound: 

    NEVER-SEEZ NSN, JET LUBE SS-30 or equivalent

  2. Install the rear oxygen sensor, and connect the rear oxygen sensor connector.
    CAUTION: Do not cross the rear oxygen sensor harness with the ground cord during installation.

    Tightening torque: 

    21 N.m (2.1 kgf-m, 15.5 ft-lb)

  3. Install the under cover. 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>REPAIR CONTENTS>NOTE>BATTERY .
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