Necessary preliminary tasks

• Remove FRONT BUMPER TRIM 
  NOTE: The operation is described on the left side; proceed in the same way for the right side.

6-cylinder models only: 

Release catches (1) from inside, taking care not to damage catch (2).

Remove trim (3) towards front.

Installation: 

Catches (1 and 2) must not be damaged.

Fig 1: Removing Trim Towards Front

Courtesy of BMW OF NORTH AMERICA, INC.

Release catches (1) on bumper trim (2).

Installation: 

Catches (1) on bumper trim (2) must not be damaged.

Fig 2: Identifying Catches On Bumper Trim

Courtesy of BMW OF NORTH AMERICA, INC.