First of all, if the car is insured, and it is all-insurance. In this way, as long as they call the police, professional claim adjusters will take photos on the spot and deal with the damaged vehicles. If the door can be repaired, they usually choose to repair it. If the door can't be repaired, they will usually replace it for you.

If there is no total insurance, or commercial insurance. I can only repair it myself. If I want to change the door, it depends on the price of your car. If it is a car of hundreds of thousands, a door will cost several thousand yuan. If it is an electric pickup truck, it usually costs thousands of dollars to add a door and change it for painting. This thing can only be used in the original factory, because the model is different and not universal.

If you can get it through sheet metal, you'd better not change it, because the price of changing parts is very expensive. The minimum will be thousands, but you can do it for a few hundred dollars. A good sheet metal master can't tell if he has been hit.

To sum up, it costs thousands of dollars to paint and replace the left back door. No car can go below this price. If you want to save money, sheet metal.