I have an 06 Sonata LX and recently I have noticed some (extremely annoying) rattling noises coming from the front passenger side area. It only occurs when I hit bumps, and in New England weather, the frost heaves are everywhere.
I am not sure if it's the speaker in the passenger door, the actual passenger seat, or the glove box. My suspicion of the passenger seat is because the noise becomes quite faint when I have a passenger, and only more noticable when I hit a bigger bump in the road. My reasoning for the glove box is because it seems to become louder when I drive with it open. The speaker is a silly thing to think of, it's possible, but why after a year did it come loose?
Hyundaitech....any clues?
-M