61 31 300 Replacing brake-light-test switch
WARNING: This page is about a different car, the 2002 BMW Z3 and 2001 BMW Z3. However, it is still accessible from the selected car via links, so may be relevant.
Brake-light-test switch is in same housing as brake-light switch.
For removal and adjustment, refer to 61 31 310 REPLACING BRAKE-LIGHT SWITCH .
Can be recognized on 4-pin connector.