You can pay off your car loan early if the contract allows, but request an official settlement figure instead of collecting the remaining installments.
Key points
The bank calculates the balance as of the payment date, including any early repayment fees or charges.
Compare the settlement figure to what you would pay if you completed the payments.
After payment, request a clearance certificate and the release of any liens or restrictions on the vehicle.
The figures, fees and limits in this answer vary by bank and change over time — confirm them with your bank or the official source before acting.