67 11 560 Replacing actuator drive for tailgate locking
WARNING: This page is about a different car, the 2016 MINI Cooper Paceman, 2015 MINI Cooper Paceman, 2014 MINI Cooper Paceman, and 2013 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.
Procedure is described in REMOVING AND INSTALLING/REPLACING TAILGATE LOCK .