51 21 150 Blocking, if necessary initializing, car key in immobilizer control module
WARNING: This page is about a different car, the 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Execution in diagnosis system:
->Service functions->
->Body->
->Locking and security functions->
->Remote control key