51 21 140 Removing and installing/replacing complete lock cylinder in left or right front door

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2010 BMW M6, 2010 BMW 650i, 2009 BMW M6, 2009 BMW 650i, and 2008 BMW M6. However, it is still accessible from the selected car via links, so may be relevant.