July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
33 21... Ribbed teeth
WARNING: This page is about a different car, the 2010 BMW 535i, 2009 BMW 535i, and 2008 BMW 535i. 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!