If you buy a car with a loan, you should mortgage the car to a bank or guarantee company. If you want to buy and sell legitimate vehicles, you need to go to the vehicle management office for transfer. If the vehicle is mortgaged, you can't transfer the ownership, and the sale can't be carried out legally. If the vehicle you sell has no formal and legal channels, then the transaction itself is illegal. Whether the buyer knows that you owe money to the bank or not, the mortgagee has the right to recover the mortgage because there is a concept of "should know". At the same time, if the vehicle is sold knowing that it has been mortgaged, it will also bear legal responsibility. I suggest that if there is a real funding problem, we should actively negotiate with banks or guarantee companies to solve it. Financial difficulties may only be temporary. Don't let your credit record go wrong, and you won't be able to deal with the bank in the future. I sincerely advise you not to do this.