The threads of the new lambda probes are already lubricated with Never Seez Compound. When installing a used lambda probe, lubricate only its threaded part with a thin and even layer of the specified paste. It is not allowed to clean and bring into contact with the lubricant the part of the lambda probe located in the exhaust pipe. When applying anti-corrosion protection to the underbody, the lambda probe must be covered. Lay the lambda probe wiring according to the original wiring diagram.
Models with M52, M60 and M62 engines
1. Separate a socket of an electrical wiring of a lambda probe.
2. Release the clamp and remove the lambda probe wire.
3. Turn out a lambda probe.
4. Tighten the lambda probe using tool no. 11 7 030 to the required torque.
Models with M52TU engine
Pre-catalytic lambda probe
1. Unclench the fastening clamp and release the electrical wiring of the lambda probe. Disconnect the precatalytic lambda probe connector.
If the connector is under the injector guard, remove the lower part of the cabin filter housing and the injector guard.
2. Remove the lambda probe using special tool no. 11 7 020.
3. Tighten the lambda probe using tool no. 11 7 020 to the required torque.
Post-catalytic lambda probes
On models with AT, with too large deviations, access to the post-catalytic lambda probe on the side of cylinders No. 4 - 6 is possible only after removing the exhaust system.
1. Remove the protective casing of the injectors.
2. In order not to confuse the connectors of the post-catalytic lambda probes for cylinder banks No. 1 - 3 and No. 4 - 6 during installation, put the appropriate marks on the connectors.
3. Release the electrical wiring from the holder and disconnect the connector. Route the wiring out of the cable duct at the rear of the engine.
4. Remove the post-catalytic lambda probe for cylinder bank No. 1 - 3 using special tool No. 11 7 030, and the post-catalytic lambda probe for cylinder bank No. 4 - 6 using special tool No. 11 7 020.
5. Installation is carried out in the reverse order. To install the lambda probes, use the same tools as for removing them.
Models with M73 engine
1. Give nuts on a cover and separate a socket.
2. Remove lambda probe with special tool 11 7 030.
3. Installation is carried out in the reverse order. To install the lambda probes, use the same tool as for removing them.