51 13 100 Removing and installing/replacing trim on hood/bonnet/wheel arch on left or right

Release nut (1) and clips (3).

Remove trim (2) outwards.

Fig 1: Identifying Nut And Clips On Trim

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Clips (1) of trim must not be damaged or missing, replace if necessary.

Fig 2: Locating Clips Of Trim

Courtesy of BMW OF NORTH AMERICA, INC.