Front Oxygen (A/F) Sensor: Removal

Disconnect the ground cable from battery.

Fig 1: Disconnecting Ground Cable From Battery
Courtesy of SUBARU OF AMERICA, INC.
Disconnect the connector from the front oxygen (A/F) sensor.

Fig 2: Identifying Front Oxygen (A/F) Sensor
Courtesy of SUBARU OF AMERICA, INC.
Disconnect the engine harness fixed by clip (A).

Fig 3: Identifying Engine Harness Clip
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Remove the front right side wheel.
Lift-up the vehicle.
Remove the service hole cover.

Fig 4: Identifying Service Hole Cover
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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)
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.

Fig 5: Identifying Front Oxygen Sensor
Courtesy of SUBARU OF AMERICA, INC.