51 21 150 Blocking, if necessary initializing, car key in immobilizer control module

WARNING: This page does not describe the selected car, but rather 19 other vehicles, including the 2010 BMW M5, 2009 BMW M5, 2008 BMW M5, 2007 BMW M5, and 2007 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.