Legal Analysis: If you don't pay back the money when you buy a car with a loan, you may be sued for paying back the money, or you may demand to recover the car to pay the use fee or pay all the car money.

Legal basis: Article 626 of the Civil Code of People's Republic of China (PRC), the buyer shall pay the price according to the agreed amount and payment method. Where there is no agreement or unclear agreement on the amount and payment method of the price, the provisions of Article 510 and Item 2 and Item 5 of Article 511 of this Law shall apply.