WARNING: This page is about a different car, the 2013 BMW X5 M, 2012 BMW X5 M, 2011 BMW X5 M, and 2010 BMW X5 M. However, it is still accessible from the selected car via links, so may be relevant.
0491698 242140 Device MW
NOTE:
(Tensioning device) For removal and installation of the snap ring before the centering plate on ZF transmissions [Discontinued]