When a car is repossessed, it will be sold by the lender/dealer/etc. (whomever financed it) and the proceeds applied against the remaining balance of the loan or financing. If the loan is not fully paid off by doing this, the lender/seller has the right to sue for any unpaid amount. Since the car had a blown engine, it probably did not sell for much, so if there was still a balance on the loan when you gave the car up, it probably was not paid off by then repossessing and selling the car; that means that the seller may indeed sue you. (Just to reiterate: the seller taking the car back does NOT mean it can't sue you; it just means that the value of the car is applied against what you owe.)In IL, someone can sue on a promissory note for up to 6 years after it was violated, and on a written contract up to 10 years. Therefore, whether the financing here was based on a promssory note or a contract/agreement, it would appear that you could be sued 2 years later.