Odor from HVAC vents on Volkswagen Beetle

Problem Description and Possible Solution

A musty odor may be noted from the heating, ventilation and AC (HVAC) system after sitting for two hours or more due to condensation in the heater case. Our technicians tell us that a cleaner is available for the heater case and the drain system should be checked for debris.

Problem Data
RepairPal Verified
Average mileage: 65,710 (18,600–127,000)
8 model years affected: 2003, 2005, 2006, 2007, more2008, 2009, 2010, 2012
20 people reported this problem
Viewing 1 - 10 of 10 comments
bits of thin black foam are coming out of ac vents... It's as if a liner or filter has deteriorated and is flying out in bits and chunks ...musty smell too. Hoping its not too $$ to have fixed at Dealer.
I have a smell coming out of the vents. At first I thought it was the last mechanic that worked on it and have used a couple of bottles of Frebreeze. Nothing. I thought it was like that Jerry Seinfeld show then realized it was coming out of the vents. It can get pretty nasty. Glad I found this site!!!
A few months back, I thought the cat had shit in the vent, so I poured extra strength fabreeze in the vent. Still stinks. Glad to know other's had the problem and Repair Pal made it public. Thank goodness! Now I can do something about it! We love our convertible, but don't like to drive it with the top up because of this.
I thought there was a dead animal under the hood of my car or something. Have not done anything about it. Sometimes it stinks, sometimes it doesn't.
Not fixed yet -- problem did not occur until I took my VW Beetle in for 40,000 mile service -- which they REQUIRED even though only a little over 18,000 miles. Stupid in my opinion. Odor started on way home. They said it's from running my air for extended periods of time. Only ran it on way home. Said they could fix it for $199.00 -- I'm not that dumb. Going to the top.
Mine was not fixed and I need to know how to fix it.
same musty odor when switching from heat to ac and ac to heat
When switching from heat to AC or back to AC.
not fixed...just open the windows with the AC on high, till odor goes away.
Dealership used a very strong cleaner. It took days for it to air out.