33 21... Ribbed teeth

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2013 BMW 328i, 2012 BMW 328i, 2011 BMW 328i, 2010 BMW 335i, and 2010 BMW 328i. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Bolts with ribbed teeth must be replaced after they have been released!

Fig 1: Bolts With Ribbed Teeth

Courtesy of BMW OF NORTH AMERICA, INC.