WARNING: This page is about a different car, the 2018 BMW X4, 2017 BMW X4, 2016 BMW X4, and 2015 BMW X4. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Tool Set (2160009)
Courtesy of BMW OF NORTH AMERICA, INC.
NOTE:
A set of the BMW hydraulic tool system for wheel bearings and output shafts (basic set for BMW, consisting of 81 64 2 155 744, 81 64 2 155 745, 81 64 2 155 746)