Front Oxygen Sensor

REMOVAL




1. Disconnect the ground cable from battery.




2. Disconnect the connector from engine hanger, and then disconnect the front oxygen (A/F) sensor connector
3. Lift up the vehicle.
4. Apply SUBARU CRC or its equivalent to the threaded portion of front oxygen (A/F) sensor, and leave it for one minute or more.

SUBARU CRC (Part No. 004301003)

5. Remove the 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 the anti-seize compound only to the 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 the front oxygen (A/F) sensor

Tightening torque: 21 N.m (2.1 kgf-m, 15.2 ft-lb)

3. Lower the vehicle.




4. Connect the connector to front oxygen (A/F) sensor, and then connect the connector to engine hanger.




5. Connect the battery ground cable to battery.