WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. 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, Z3coupe