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.
NOTE:
(Protective insert) For spring retainer 31 3 123 and 31 3 129 Discontinuation and replaced by 31 3 350 (0 493 560)