Fan motor: Water damage

As a result of water ingress a yellow deposit forms (grease erosion from bearing: see Fig 1).

Fig 1: Identifying Water Damage On Blower Motor (Grease Erosion)

Courtesy of BMW OF NORTH AMERICA, INC.

As a result of water ingress the housing of the blower motor is damaged.

Fig 2: Identifying Water Damage On Blower Motor (Corrosion Marks)

Courtesy of BMW OF NORTH AMERICA, INC.

The water leaves behind white deposits in the engine bracket.

Fig 3: Identifying Water Damage On Engine Bracket (L2 Blower)

Courtesy of BMW OF NORTH AMERICA, INC.