Condensation may develop in the heater case which can cause a musty odor from the heating, ventilation and AC (HVAC) system. Our technicians tell us a cleaner is available for the heater case. Also, the drain system should be checked for debris.
Odor from HVAC vents on Volkswagen Passat
Average mileage: 70,833 (40,000–109,000)
15 people reported this problem
6 people shared problem details
2009 Volkswagen Passat42,000Visitor
musty smell in cabin. Not fixed as yet
2009 Volkswagen PassatVisitor
This happens every spring. Tired of paying VW to do whatever "treatment" they have
2001 Volkswagen Passat79,000Visitor
Yes, I have a 2005 Passat, and have noticed over the past few weeks of a stale, musty smell coming through both dashboard and windscreen vents. It smells like air moving across damp insulation, and when the sunlight is in the car, the vapour is visible through the vents, plus it fogs up the inside of the windscreen.
2006 Volkswagen Passat90,000Visitor
stinky stinky car!! We've cleaned EVERYTHING inside, but the odor persists. We've flushed the hvac system four times, changed the interior filters, pulled up the carpet and cleaned weird moldy stains. Don't know what else to do!
2009 Volkswagen Passat65,000Visitor
Nasty smell for vents, mostly when using fresh air inlet. Not as bad when using AC with recirculation enabled.
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