LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2022 >> WRX Base, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System >> Rear Oxygen Sensor >> Removal
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Rear Oxygen Sensor: Removal

CAUTION:

Vehicle components are extremely hot after driving. Be wary of receiving burns from heated parts. 

  1. Disconnect the ground terminal from battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY
  2. Lift up the vehicle.
  3. Remove the under cover front. Ref. to EXTERIOR/INTERIOR TRIM>FRONT UNDER COVER>REMOVAL
  4. Apply spray-type lubricant to the threaded portion of rear oxygen sensor, and leave it for one minute or more.

    Preparation items: 

    Spray type lubricant: CRC5-56 (part No. 004301003) or equivalent

  5. Disconnect the rear oxygen sensor connector (A), and remove the rear oxygen sensor.
    CAUTION:

    When removing the rear oxygen sensor, wait until exhaust pipe cools, otherwise it will damage the exhaust pipe. 

    G14601056Courtesy of SUBARU OF AMERICA, INC.