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.
0492471 Holding 343000 sleeve MW
NOTE:
(Assembly sleeve) For inserting the piston with sleeve into the tandem brake master cylinder, dual circuit braking system [Discontinued]