Front Oxygen Sensor (U5/Low Emissions)

REMOVAL

LH SIDE




1. Disconnect battery ground cable.




2. Disconnect connector from front oxygen sensor.
3. Lift-up the vehicle.




4. Remove front oxygen sensor harness from bracket.
5. Apply SUBARU CRC or its equivalent to threaded portion of front oxygen sensor, and leave it for one minute or more.

SUBARU CRC (Part No. 004301003)




6. Remove front oxygen sensor.

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

RH SIDE




1. Disconnect battery ground cable.




2. Disconnect connector from front oxygen sensor.
3. Lift-up the vehicle.




4. Remove front oxygen sensor harness from bracket.
5. Apply SUBARU CRC or its equivalent to threaded portion of front oxygen sensor, and leave it for one minute or more.

SUBARU CRC (Part No. 004301003)




6. Remove front oxygen sensor.

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

INSTALLATION

LH SIDE

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

CAUTION: Never apply anti-seize compound to protector of rear oxygen sensor.

Anti-seize compound: SS-30 by JET LUBE




2. Install front oxygen sensor.




3. Install front oxygen sensor harness to bracket.
4. Lower the vehicle.




5. Connect connector to front oxygen sensor.




6. Connect battery ground cable.

RH SIDE

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

CAUTION: Never apply anti-seize compound to protector of front oxygen sensor.

Anti-seize compound: SS-30 by JET LUBE




2. Install front oxygen sensor.




3. Install front oxygen sensor harness to bracket.
4. Lower the vehicle.




5. Connect connector to front oxygen sensor.




6. Connect battery ground cable.