The door latch mechanisms are all faulty. I have read in many forums where this is a common issue with Hyundai models. The door latch on the back passenger door will not operate from inside or outside. The other three doors must be pulled on repeatedly in order to gain access. This creates a very dangerous situation of entrapment if there car were to catch fire or be in an accident. Its almost impossible to get into the car from any door. The issue isnt a locking issue either, doors will eventually open after repeated attempts.