Front Oxygen (A/F) Sensor

REMOVAL




1. Disconnect battery ground cable.




2. Disconnect connector from front oxygen (A/F) sensor.
3. Lift-up the vehicle.
4. Remove under cover.
5. Apply SUBARU CRC or its equivalent to threaded portion of front oxygen (A/F) sensor, and leave it for one minute or more.
SUBARU CRC (Part No.004301003)

6. Remove front oxygen (A/F) sensor.









CAUTION: When removing front oxygen (A/F) sensor, do not force front oxygen (A/F) sensor especially when exhaust pipe is cold, otherwise it will damage exhaust pipe.

INSTALLATION

1. Before installing front oxygen (A/F) sensor, apply anti-seize compound only to threaded portion of front oxygen (A/F) sensor to make the next removal easier.

Anti-seize compound: SS-30 by JET LUBE

CAUTION: Never apply anti-seize compound to protector of front oxygen (A/F) sensor.







2. Install front oxygen (A/F) sensor.
3. Install under cover.
4. Lower the vehicle.




5. Connect connector of front oxygen (A/F) sensor.




6. Connect battery ground cable.