51 17 400 Removing and installing/replacing bump stop with injector for filler flap

Release cover (1).

Press catches (2) together and pull out injector (3).

Installation: 

Install injector (3) with fitted cover (1).

Fig 1: Installing Injector With Fitted Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Catches (1) on injector (2) must not be damaged.

Make sure cover (3) is correctly seated on injector (2).

Fig 2: Identifying Catches On Injector

Courtesy of BMW OF NORTH AMERICA, INC.