Grumpycatforever

I have an nx200 and the hatchback will open (automatically when pressing the button on dash or key fob) 30% of the time. The rest of the time it just beeps (long beep) and then fails to open so I have to do it manually. The Lexus dealership wanted to replace the hatch back motor but since it works some of the time is that really the problem? Any advise is appreciated. IMG_4147.MOV