Discovery I (LJ) V8-4.0L (1996)
Oxygen Sensor: Service and Repair
HEATED OXYGEN SENSOR (HO2S)
WARNING: Do not attempt HO2S removal when the exhaust is hot.
Remove
For all sensors:
1. Raise and support front of vehicle.
2. Release sensor lead from clips.
RH front sensor only
3. Remove nuts retaining coil bracket and position bracket aside.
4. Release multiplug from bracket behind cylinder head.
5. Disconnect multiplug and release sensor lead from clip.
6. Unscrew and remove sensor from exhaust pipe.
LH front sensor
7. Disconnect multiplug and release from bracket.