(Removing left and right brake ventilation duct)

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

Removing the brake ventilation duct

Release expanding rivet (1) from brake ventilation duct (2) from the bottom

Courtesy of BMW OF NORTH AMERICA, INC.
Loosen screws (1)
Release expanding rivet (2)
Guide out and remove brake ventilation duct (3) to the front

Courtesy of BMW OF NORTH AMERICA, INC.