Odor from HVAC vents on Dodge Nitro

Some vehicles may develop a musty odor coming from the HVAC system, Dodge has issued a cleaner/disinfectant and a coating for the evaporator designed to inhibit bacterial growth.

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Average mileage: 103,105 (53,423–161,000)
3 model years affected: 2007, 2008, 2010
11 people reported this problem
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problem details
2010 Dodge Nitro 53,423 mi,
I have the problem of foul smell coming out of the vents, especially when the heater is on, smells like a greasy oily unkept Garage blowing out of the vents
2007 Dodge Nitro 161,000 mi,
There is a odor that comes from the airconditioner. I just keep spraying airfreshener. But I know it is defective.
2007 Dodge Nitro 98,000 mi,
Afoul odor is always present. There are times when it is unbearable. we have tried many things including having the car detailed every month and spraying with deodorizers and disinfectants to no avail. The problem has not been fixed.