51 12... Removing and installing/replacing diffuser on rear bumper trim (M Technic aerodynamic kit)

Necessary preliminary tasks:

Release retaining elements (1, 3 and 4).

Release catches (2) and remove diffuser (5).

Installation:

Catches (2) must not be damaged

Diffuser (5) must be correctly seated in guides next to retaining elements (4).

Fig 1: Identifying Retaining Elements And Diffuser

Courtesy of BMW OF NORTH AMERICA, INC.