I have the same problem when I am beating on it a bit. I think its the cat its brand new so some romping has to smell. Ever notice when you're behind a new car and he gets on it a bit. You smell it. I guess its just breaking in, but i'll tell you one thing if this happens past 7,000 miles i'm bringing it back. Plus if anything breaks so what, i got the warranty and get a rental for free. It'll spare me the miles and gas on my car for the week.