Impreza 2.5 RS Sedan AWD F4-2.5L SOHC (2002)
Oxygen Sensor: Service and Repair
Front Oxygen (A/F) Sensor
REMOVAL
1. Disconnect the battery ground cable.
2. Disconnect the connector from the front oxygen (A/F) sensor.
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
