Impreza GT F4-2.5L Turbo (2009)
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Oxygen Sensor: Service and Repair
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.
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AT MODEL
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MT MODEL
5. Apply spray-type lubricant 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.