34-1170 Tool
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.
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.