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Home >> Subaru >> 2018 >> WRX Base >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel Injection System (Except For STI) >> Rear Oxygen Sensor >> Installation

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.

    Anti-seize compound:

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

  2. Install the rear oxygen sensor.

    Tightening Torque:

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

    G10266248
  3. Connect the rear oxygen sensor connector to the engine wiring harness.
    G10266247
  4. Install the under cover. Ref. to EXTERIOR/INTERIOR TRIM>Front Under Cover>INSTALLATION .
  5. Lower the vehicle.
  6. Connect the ground terminal to battery sensor. Ref. to NOTE>BATTERY .
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