24-5362 nut
WARNING: This page is about a different car, the 2011 BMW X6 and 2010 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.
0491783 245362 nut Minimum set: Mechanical tools MW
NOTE:
(Union nut) Discontinued, only available via complete tool [cannot be ordered separately]
Courtesy of BMW OF NORTH AMERICA, INC.