How can money mixed with usury and a car purchased with usurious money be purified after repenting from the usurious loan and before repaying the full amount to the institution?

The door of repentance is open for all sins, and those who repent from usury and bribery, who have wronged themselves, should not despair of Allah's mercy.

The repentance of a borrower of usury is easier than that of a lender. The borrower regrets and resolves not to return to the sin, and pays back only the principal if able. If unable and it is taken from him legally, there is no blame upon him.

The money borrowed with usury is owned by the borrower; he is not obliged to dispose of it or give it in charity, and it is permissible to benefit from it.

The borrower should hasten to repay the loan if able, and increase in righteous deeds and charity.