Connecting cables of oxygen sensors are not repaired or soldered. If there is damage, the cable is replaced as a set.
Withdrawal
The operation of lifting and placing the vehicle on stands is dangerous! Therefore, before carrying out the operation, read Section Jacking and towing
1. Raise and place the vehicle on stands.
2. Models 316i, 318i: Disconnect the connector -3- of the oxygen sensor and unscrew the sensor -4- from the exhaust pipe.
3. Models 320i, 323i, 328i: Disconnect plug connections of oxygen sensors (two arrows on the right in the illustration).
Label the plugs so as not to mix them up during assembly. Remove the motor cover to expose the plugs, refer to Section Removal and installation of the bottom cover of an impellent compartment.
4. Detach the cable holder (left arrow). Remove the oxygen sensors from the intake pipe. This requires a ring wrench, eg HAZET 468/4.
Installation
Do not clean the oxygen sensor near the top and avoid contact with grease. When applying a protective coating on the bottom, cover the sensors.
5. Coat the threads of the oxygen sensor with special high temperature grease "Nevar seez Compound".
If the oxygen sensor is screwed in without high temperature grease, the threads will burn over time and the sensor cannot be removed. The new sensors are coated accordingly.
6. Screw the oxygen sensor into the downpipe and tighten to 55 Nm.
7. Lay the electrical wire so that it does not fray and does not touch the exhaust system.
8. Install the engine cover.