I'm just curious to see if someone can help me. I can't tell if it is exhaust fumes or if it's just bad air from maybe the heater. Naybe bad cabin filter but when I have the heat on it's kind of like a musty smell I'm just nervous to make sure I'm not inhaling exhaust fumes. I've had the car for over a year it's a 2002 Bug eye. The smell doesn't make me dizzy or nauseous or anything like that. Im not smart or handy wih cars just looking for help.