Front Oxygen Sensor

Front Oxygen (A/F) Sensor

REMOVAL




1. Disconnect ground cable from battery.




2. Disconnect connectors from engine hanger and front oxygen (A/F) sensor.
3. Lift-up the vehicle.
4. 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)




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

CAUTION: When removing the oxygen (A/F) sensor, wait until exhaust pipe cools, 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. Lower the vehicle.




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




5. Connect battery ground cable.