3.0 Air Conditioning Unit Disinfectants
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A musty odor may be detected in the vehicle, particularly when the air conditioner is first switched on.
This is caused by microorganisms growing on the evaporator from moisture condensation.
A disinfectant can be applied to the air conditioning system:
"Airguard" by J. J. Products, Inc.; "Airsept" by The Auto Doctor or Air Conditioning and Heating System Treatment by Wurth USA, Inc.
Such disinfectants are not available from BMW of North America.
See S.I. Bulletins B 64 08 91 and B 64 01 01.