[eriktherod]

Oh yes, the seat belt strap holders (the black and red strap with the snap button) will definitely rattle if not fastened.

I've also had the seat belts in the back like to 'flap' against the side interior plastic when the windows are down at cruising speeds. I have the back seat belts secured (like connected as if there were passengers) just so they don't make noise, which ironically is how they were when I got the car.

Other than that I had a beautiful silent drive home tonight with no music and just the windows down. No rattles from what I could tell.