Condensation in the heater case may cause a musty odor from the heating, ventilation and AC (HVAC) system after sitting for two hours or more. Our technicians tell us that a cleaner is available for the heater case and the drain system should be checked for debris.
Odor from HVAC vents on Volkswagen GTI
Average mileage: 48,600 (30,000–82,000)
14 people reported this problem
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Musty odor Clifton ventilation. Reported it to Bozzani VW, and they stated that they would look into it. Hasn't been resolved.