Replacing Rear Bumper Trim (51 12 157) And Replacing Rear Bumper (51 12 001):

Unclip flap (1) on handle from bumper (2).

Fig 1: Unclipping Flap On Handle From Bumper

Courtesy of BMW OF NORTH AMERICA, INC.

Remove speed nuts (1).

Version with Park Distance Control (PDC):

If necessary, remove all rear ultrasonic transducers.

Mounts must not be damaged in area (2).

Fig 2: Removing Speed Nuts

Courtesy of BMW OF NORTH AMERICA, INC.