63 12... Headlight fogging fault pattern

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NOTE: Certain weather conditions can lead to fogging on the inside of the headlight lens.
This is not necessarily a fault that requires replacement of the headlight.

Permissible fogging. Headlight does not need to be replaced.
Impermissible fogging. Replace the headlight.

Fig 1: Identifying Permissible And Impermissible Headlight Fogging

Courtesy of BMW OF NORTH AMERICA, INC.