Oxygen sensor (4.0 V8 engine) (Discovery 1)

Removal

Both sensors

1. Raise the front of the vehicle and place it on stands.

2. Release the sensor wires from the clips on the right front sensor only.

3. Unscrew the ignition coil clamp fastening nut and move the clamp with the coil to the side.





4. Release the sensor connector from the bracket behind the cylinder head.

5. Disconnect the connector and release the wires from the clip.

6. Remove the sensor only the left front sensor.

7. Release the sensor connector from the bracket.

8. Unscrew the sensor using the LST 134 key.

Rear sensors

9. Release the sensor wires from the clips.



10. Release the sensor connector from the bracket and disconnect it.





11. Unscrew the sensor using the LST 134 key.

Installation

12. Clean the sensor and its seat. Apply anti-seize compound to the sensor threads.

Note: The new sensor already has the compound applied.

13. Tighten the sensor to a torque of 20 mm (use key LST134).

14. Reinstall the removed parts.