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[FONT=Geneva][SIZE=7][COLOR=blue]After 3 years of trying to track down this smell, (mostly present in the summer months) I finally tracked down the culprit. IT IS NOT THE AC OR HAS NOTHING TO DO WITH THE AC/HEAT VENTS. THE SMELL seems to come from the vents but IT IS NOT THE VENTS -- THE PROBLEM IS 1 or 2 DEFECTIVE FREEZE PLUGS IN THE REAR OF THE AUTO. Look underneath the trunk (IF SANTA FE it's 2 RUBBER PLUGS UNDER THE REAR CABIN, next to spare tire) you will see rubber plugs in the sheet metal body. When you remove the rubber plugs you will see the ground through the inside of auto. These plugs leak and water is getting into the cabin. The Santa Fe has sound insulation that is absorbing the water & turning moldy. You will have to completely disassemble the plastic storage compartments in rear, many screws & plastic snap on fasteners. Once you get to the FOAM it will be soaking wet & IT SMELLS LIKE ****. TEAR the wet foam out completely and spray the remaining fabric with lysol or fabreeze. Then USE High grade RTV silicone to SEAL the plugs. Make sure you coat the entire rubber plug - I even glued a thick piece of plastic over the silicone coated plug as back up to prevent water from getting back inside the REAR cabin. I chose not to replace the foam but you can put any similar material in its place. Email me if you have questions. aralight@netzero.net GOOD LUCK. ROB
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