51 21... Removing and installing left or right lock barrel of front door

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2016 BMW 760Li, 2015 BMW 760Li, 2014 BMW 760Li, 2013 BMW 760Li, and 2012 BMW 760Li. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove CARRIER FOR OUTER DOOR HANDLE

Release screws (1).

Remove gearing cover (2).

Fig 1: Identifying Gearing Cover And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Press down latch mechanism (1) slightly.

Turn lock cylinder (2) in direction of latch mechanism (1) and remove.

Fig 2: Turning Lock Cylinder

Courtesy of BMW OF NORTH AMERICA, INC.