FIAT, fino a un certo Punto

"Fiat" means in Latin "Let it be", and that's exactly how this factory is producing the car.
The other day, I had to take the car for yearly technical inspection, and it didn't pass because the backdoor didn't open. After a quick research on the internet, I've discovered this is a common issue of FIAT Punto.
Bloody hell, it didn't get this through the manufacturer's head that the piece of plastic will go bad after a while? Or they did it on purpose to cut some costs and let the user solve the problem.
The situation was solved with placing a piece of metal to cover that ditch, but I've reached the end of the rope!