Rear Oxygen Sensor: Removal

Disconnect the ground cable from battery.

Fig 1: Disconnecting Ground Cable From Battery
Courtesy of SUBARU OF AMERICA, INC.
Lift up the vehicle.
Remove the under cover. Refer to REMOVAL .
Disconnect the rear oxygen sensor connector.

Fig 2: Identifying Front And Rear Oxygen Sensor Connector With Clip
Courtesy of SUBARU OF AMERICA, INC.
Remove the three clips of the front mat guard RH and turn up the front mat guard RH.

Fig 3: Locating Front Mat Guard Clips (RH)
Courtesy of SUBARU OF AMERICA, INC.
Apply spray-type lubricant to the threaded portion of rear oxygen sensor, and leave it for one minute or more.
Remove the rear oxygen sensor.
CAUTION: When removing the rear oxygen sensor, wait until exhaust pipe cools, otherwise it will damage the exhaust pipe.

Fig 4: Locating Rear Oxygen Sensor
Courtesy of SUBARU OF AMERICA, INC.