20. The pre-catalytic lambda probe is installed in the intake section of the catalytic converter or on the exhaust manifold. Disconnect the lambda probe wiring connector. Using a special key (Opel-KM-6129), carefully unscrew and remove the probe.
21. A post-catalytic lambda probe is usually installed on the first (reception) sections of the exhaust system. Raise the car on a lift, disconnect the probe wiring connector. Carefully unscrew the lambda probe using the socket (see resist. illustration) and take it off.
20.21. Removal of the post-catalytic lambda probe using the end cap KM-6129 (A): 1. Wiring connector
22. Installation is made in an order, the return to an order of removal. Before installation, lubricate with a thin layer of BOSCH or Opel heat-resistant mounting paste (black, no. 1948569/90513210) lambda probe thread (petrol engine: black grease, diesel engine: white grease), put it in place.
Attention: Mounting paste should only be applied to the thread, do not allow it to get on the body of the lambda probe!
Note: If the lambda probe is installed without the use of a heat-resistant lubricant, the thread will begin to stick over time. As a result, it will not be possible to unscrew the probe at the next service. New sensors already have the necessary lubrication.
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