I bought this car brand new from Hyundai. Immediately I noticed a rattle coming from the sunroof when going over bumps or listening to songs with bass. After about 4000 miles, I took the car back to the dealer after I was told about the 12 month 12000 mile warranty on body shakes and rattles. They had my car for an entire day and told me that although they could easily duplicate the problem, there was not a known fix. The tech recommended putting a piece of foam between the glass and the sunshade. Really?

Very annoying. The rattle is only silenced when I close the sunshade.