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:
(Knurled nut (4 pieces)) Can no longer be ordered separately. Only available as part of set 00 2 500 = 83 30 0 490 170.