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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 >> Removal

Rear Oxygen Sensor: Removal

  1. Disconnect the ground terminal from battery sensor. Ref. to NOTE>BATTERY .
  2. Lift up the vehicle.
  3. Remove the under cover. Ref. to EXTERIOR/INTERIOR TRIM>Front Under Cover>REMOVAL .
  4. Disconnect the connector on the rear oxygen sensor from the engine wiring harness.
    G10266247
  5. Apply spray-type lubricant (004301003) to the threaded portion of rear oxygen sensor, and leave it for one minute or more.
  6. Remove the rear oxygen sensor.
    CAUTION: When removing the rear oxygen sensor, wait until exhaust pipe cools, otherwise it will damage the exhaust pipe.
    G10266248
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