beamNG drive needs seats that can be moved front and back, windows that can be opened by pressing a button, adjustable steering wheel, working windshield wipers, working radios, doors that can open without crashing the car, interior cargo such as phones, boxes, etc.
Some of that stuff has already been suggested. I already made a thread for working windshield wipers a few weeks ago. Try using the search button to see if stuff has been suggested already.
