34-1170 Tool
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.
0492463 341170 Tool MW
NOTE:
(Installation tool) For pressing in the shielding caps on both sides in the fixed caliper shafts - brake piston diameter 54 - 57 mm / single-circuit brake system [Discontinued]
Courtesy of BMW OF NORTH AMERICA, INC.