Is it permissible to sell a car purchased in installments – for which the installments have not yet been paid – to another party, on the condition that the new buyer pays the remaining installments to the company, in exchange for exchanging it for a new car after 6 months, with the seller paying the installments during these six months?

In summary, selling an old car for a new one at a deferred price, with the second party bearing the installments, is permissible, as long as the specifications of the new car are defined and clear to avoid uncertainty (gharar), since cars are not usurious assets. However, if the old car is mortgaged to the company, it is not permissible to sell it except with the permission of the mortgaging company or by expediting its right.