Is it permissible to purchase a car in convenient installments from a car dealership through a financing institution?

It is not possible to definitively rule on the permissibility of installment sales with the aforementioned entity without knowing the nature of the contract. However, installment sales are permissible under certain conditions, including that they do not involve usury (such as stipulating an increase for late payment), and that the entity owns the commodity before selling it to the client.