51 12 223 Removing and installing/replacing trim for rear bottom middle bumper trim

Version with trailer tow hitch: Release screws (1) and remove tow hitch flap (2).

Unclip trim (3) all round from bumper trim.

Fig 1: Identifying Screws, Trim And Tow Hitch Flap

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Catches (1) and guides (2) on trim (3) must not be damaged.

Fig 2: Identifying Catches, Guides And Trim

Courtesy of BMW OF NORTH AMERICA, INC.