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Home >> Subaru >> 2009 >> Forester F4-2.5L DOHC Turbo >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Oxygen Sensor >> Service and Repair >> Rear Oxygen Sensor
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Rear Oxygen Sensor

Rear Oxygen Sensor

REMOVAL
1. Set the vehicle on a lift.
2. Disconnect the ground cable from battery.






3. Lift up the vehicle.
4. Disconnect the connector from the rear oxygen sensor, and remove the clip (A) holding the rear oxygen sensor harness.






5. Apply spray-type lubricant or equivalent to the threaded portion of rear oxygen sensor, and leave it for one minute or more.
6. Remove the rear oxygen sensor.

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

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

Anti-seize compound: NEVER-SEEZ NSN, JET LUBE SS-30 or equivalent

2. Install the rear oxygen sensor.






3. Connect the connector to the rear oxygen sensor, and hold the rear oxygen sensor harness with clip (A).






4. Lower the vehicle.
5. Connect the battery ground cable to the battery.




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