51 46 050 Removing and installing/replacing finisher for top of rear apron.

Open trunk lid and left/ right flaps.

Unfasten left/right nuts.

Fig 1: Remove Left/Right Nuts As Illustrated

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten expanding rivets and remove finisher strip.

Fig 2: Removing Finisher Strip For Top Of Rear Apron

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Insert guide spigot (1) on finisher into bottom of tail panel.