Disabling System
WARNING: This page is about a different car, the 2002 BMW 745i and 2002 BMW 745Li. However, it is still accessible from the selected car via links, so may be relevant.
Before proceeding, see AIR BAG SAFETY PRECAUTIONS . Obtain radio anti-theft code. Record programmed radio stations. Ensure ignition is off. Disconnect and shield the negative battery cable. Wait at least 5 seconds before servicing vehicle.