2009 Volkswagen Jetta Q&A
2009 Volkswagen Jetta Question: thumping noise coming from under passenger dash.
Probably so debris caught in the fan blades of the blower motor,we see a lot of rodents build nests in the air ducts as well particularly if the car has sat unused for a while. Remove the blower motor and inspect for debris and check the motor bearings and blades. - patrick mannion