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:
(Lock pin) Engine: M52, M52TU, M54, M56 sale of existing inventory, then available as part of set of special tools 11 3 290 = 83 30 0 490 966 only - as of 29.11.2011