Odor from HVAC vents on Volkswagen Touareg

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.

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Average mileage: 80,782 (36,000–170,000)
8 model years affected: 2004, 2005, 2006, 2007, more2008, 2009, 2010, 2012
21 people reported this problem
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problem details
2012 Volkswagen Touareg 55,000 mi,
awful smell from heater and AC at any speed. odor leaves when the car has been on for a while but eventually returns. I have to get it checked out and will come back with an answer.
It has not been fixed... I'm glad I found this. They changed the filter and it went away but than it came back a little bit after that.
2008 Volkswagen Touareg 36,000 mi,
Horribly musty, "bad rag" odor coming from vents when turning on AC. It doesn't seem to stink when I use the heater, just the AC. It's awful.
2006 Volkswagen Touareg 112,978 mi,
Water leake onto flood from heating system. At high speed approx. 65 - 70 vehicle vibrate,told the problem is drive shaft / bearing.