I have wheel noise, best described as a whistling or higher pitched grinding noise, that my 2007 Sonata makes. The noise occurs almost exclusively when driving straight - when I make turns or apply the brakes the noise goes away. I took it into the dealer (6/12/08), they said they checked everything, even test drove the car and didn't hear the noise (it does sometimes take a bit of time while driving for the noise to kick in, but the noise is there EVERYTIME I drive). Again, the dealer says there is nothing wrong with brakes, tires, suspension, etc. So I am not worried about safety, but the noise is annoying and embarrassing. The dealer thinks it is the brakes getting too hot and then making the noise. I honestly do not drive more than 28 miles round trip to work and back, so I cannot believe the brakes get too hot. Anyone have any ideas what it can be or what I can do? Is my dealer full of you know what? Thanks in advance.