I traded in a GEN 3 Tauras for my Fusion. That OLD CAR had a darn good cabin filtration system. With this NEW fusion, I can smell the awful odors from outside. GREASE from a Burger King Cigarette smoke from the car next to me at a stop light. It's ODD. My cheap, little old car never let bad smells in. And I'm a smell guy. So it's a minor quibble that irks me everyday....