Oxygen Sensor
- Disconnect wiring from sensor. On Porsche 911SC, remove left rear wheel and protector plate. Remove shield from sensor if equipped. Remove sensor.
- Coat threads of new sensor with anti-seize compound. Take care not to get compound into slots on end of sensor. Install sensor and tighten to 36-44 ft. lbs. (50-61 N.m) on Volvo models or to 25-30 ft. lbs. (35-41 N.m) on all other models. Refit shield and connect sensor wire.