51 21 140 Removing and installing/replacing complete lock barrel in left or right front door

Necessary preliminary tasks: 

• Remove CARRIER FOR OUTER DOOR HANDLE 

Detach trim (1) at catch (2) and remove.

Fig 1: Identifying Trim And Catch

Courtesy of BMW OF NORTH AMERICA, INC.

Twist lock barrel (1) in direction of arrow and remove.

Fig 2: Twisting Lock Barrel

Courtesy of BMW OF NORTH AMERICA, INC.