Forester F4-2.5L SOHC (2004)
Oxygen Sensor: Service and Repair
Rear Oxygen Sensor
REMOVAL
1. Disconnect the ground cable from battery.
2. Lift-up the vehicle.
3. Disconnect the connector from the rear oxygen sensor.
4. Apply SUBARU CRC or its equivalent to the threaded portion of rear oxygen sensor, and leave it for one minute or more.
SUBARU CRC (Part No. 004301003)
5. Remove the rear oxygen sensor.
CAUTION: When removing the oxygen sensor, wait until exhaust pipe cools, otherwise it will damage exhaust pipe.
INSTALLATION
1. Before installing rear oxygen sensor, apply the anti-seize compound only to the threaded portion of rear oxygen sensor to make the next removal
easier.
