51 21 360 Replacing seal for door seam/roof frame on left or right front door

Lever out plastic rivet (3).

Lever seal (2) out of decorative strip (1).

Installation: 

Seal (2) must be correctly seated on decorative strip (1) and front door (4).

Decorative strip (1) must match trim (5).

Fig 1: Identifying Plastic Rivet, Seal, Decorative Strip, Door Edge And Trim

Courtesy of BMW OF NORTH AMERICA, INC.

Lever out seal (1) from rear to front.

Installation: 

Make sure seal (1) is correctly seated on trim strip (2).

Fig 2: Removing Seal From Trim Strip

Courtesy of BMW OF NORTH AMERICA, INC.