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 (2 pieces)) With protective insert 31 3 328 - Series: E31, E38, E39 front high (2x) and basis (1x)/model: Z3, Z3coup