An accident vehicle refers to a vehicle that has been severely hit, flooded, burned, etc. But even after the repair, there are still security risks. After buying an accident car, the specific rights protection methods are as follows: 1. Negotiate with the merchants about compensation. 2. If negotiation with the merchant fails, call 123 15 Consumers Association for help. 3. For the illegal act of concealing the accident car, you can also complain to the local industrial and commercial department, and the staff of the relevant departments will come forward to investigate and mediate the dispute. If the mediation is unsuccessful, you can also defend your rights through legal channels and appeal to the court.