I am starting a thread on this problem as it may be that more than two of us are experiencing this issue. Today when backing out in the garage, as soon I started to reverse it sounded like I had hit something as a very loud clunk occurred. It was very startling. My husband looked under the car and couldn't see anything. As we drove we heard continual clunking at low speeds. Each time I backed I would get a small clunk sound. I have booked into the dealership tomorrow. Another member here has experienced the same situation and is awaiting caliper replacement and the dealership direction from Hyundai. So if anyone else is experiencing clunking this thread is a good place to report it. Thanks. PS I will update after the visit to service dept. tomorrow.