Originally Posted by citizen_insane
I've got a 2007 and it's dead quiet on the highway at all speeds. I'd say take it in and have the dealer look at it.
Same with my 2007 wagon - except for the a bit of wind noise from the huge sunroof when the internal cover panel is retracted. Apparently this is normal on the wagons because of the size of the sunroof, but the sedans should be quiet.