Headlight fogging fault pattern

NOTE: Certain weather conditions can lead to fog on the inside of the headlight diffuser.

This is not necessarily a fault that requires replacement of the headlight.

Courtesy of BMW OF NORTH AMERICA, INC.

Top row (A): Permissible fogging.

Headlight does not need to be replaced.

Bottom row (B): Impermissible fogging. Replace the headlight.