It depends on the loan contract that you signed with them. See if it contains any item(s) for early repayment of the financing. Usually, they give you partial credit for repaying the full value early, but not always.

Traditional commercial banks usually do give you the net discounted present value of the remaining balance of the loan. Islamic banks and Islamic finance companies do not. Bargain with them and try to convince them to give you a break, depending on the Murabaha or Musawamah rate that they offered you when you applied for the car financing. Good Luck.