Is it permissible to buy a car from a seller who deals with a bank that compels the buyer to pay an additional percentage on the original price, such that the total amount paid is greater than the remaining value of the car?

If the bank genuinely purchases the car, it is permissible for it to sell it to the customer at the agreed price, whether paid in installments or deferred. However, if the bank does not actually purchase the car, but instead pays its price to the seller so that it can take more from the customer in installments, this is considered a usurious loan; because "every loan that draws a benefit is usury."