Contents: Removal ⬇ Installation ⬇
Note: This sensor is also known as the lambda sensor.
Removal
1. Disconnect the negative cable from the battery.
2. Disconnect the electrical wiring of the oxygen sensor, which is located behind the coolant expansion tank.
3. Apply the handbrake, then jack up the front of the car and place it on axle stands placed under the sides of the body frame.
4. For models with two overhead camshafts (DOHC), remove the lower engine guard plate as described in Section 11.
5. On models equipped with the Multec injection system, the sensor is screwed into the exhaust manifold. Release the wiring from the sensor to the connector (attached to the radiator cooling fan housing or behind the coolant expansion tank) from staples; disconnect the wiring before unscrewing the sensor
6. On other models, unscrew the oxygen sensor from the front section of the exhaust system (see illustration). It is recommended to work with gloves, as the exhaust system is very hot.
7. Remove the oxygen sensor and wiring, being careful not to burn the wiring on the exhaust system; if the sensor is to be reused, be careful not to lose the O-ring or to prevent the sensor from falling.
Installation
8. If a new sensor is being installed, its threads will be coated with a special lubricant to prevent it from becoming stuck in the exhaust system.
9. If installing an old sensor, check that the threads are clean. Coat the threads with lithium grease (Opel #90295397).
10. Install in reverse order. Check that there are no leaks from the exhaust system with the engine running.
Text copied from an online resource: OpelBook
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