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 And Decorative Strip

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: Identifying Seal And Trim Strip

Courtesy of BMW OF NORTH AMERICA, INC.