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: Unfastening Left/Right Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten expanding rivets and remove finisher strip.

Installation: 

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

Fig 2: Inserting Guide Spigot On Finisher Into Bottom Of Tail Panel

Courtesy of BMW OF NORTH AMERICA, INC.