Install the bottom left and right B-pillar trim panel

NOTE: Description is for left component only. Procedure on the right side is identical.

Install the lower B-pillar trim panel

Check the clips (1) for damage and replace where required.

Courtesy of BMW OF NORTH AMERICA, INC.
Fit the B-pillar trim panel and feed in below the sealing lips of the edge protections.
Clip in the B-pillar trim panel with the clips (1).

Courtesy of BMW OF NORTH AMERICA, INC.