313324 Ring AM
WARNING: This page is about a different car, the 2016 BMW Z4, 2015 BMW Z4, and 2014 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
(Spring retainer ring) With centering ring 31 3 331 only for series E46/Without centering ring 31 3 331 for series E31, E39 front basis/model: Z3, Z3coup
Courtesy of BMW OF NORTH AMERICA, INC.