WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. However, it is still accessible from the selected car via links, so may be relevant.
0491567 232230 Washer MW
NOTE:
For detaching the guide bush from the gear wheel or output shaft with the toothed lock washer tensioned [discontinued]