It started 4 years ago right after purchasing the vehicle. I slammed on my breaks and my childs seatbelt unbuckled and he came flying forward and hit the back of the seat in front. I reported this to the Hyundai dealership where they reluctantly replaced my seatbelt. It has come unlatched less frequently. Now the seatbelt on the other side continues to come unlatched while driving. It happens about once every couple months, and always while driving. I am very concerned for my childs safety and worry about having to slam on my breaks.