WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Front Bumper Components
Courtesy of BMW OF NORTH AMERICA, INC.
Illustration created using E60 standard equipment as an example. There may be differences in detail in the case of other equipment specifications.