Finding the right car under $500 down in Ontario, CA is just a few simple steps away. Each used vehicle in Ontario listed can be bought with $500 down. Buy a car with 500 dollars down in Ontario and get an auto loan with $500 down at a single convenient Ontario California location. Our Riverside-San Bernardino area used car dealers offer you the best chance to finance a used car in Ontario with a low down payment and a monthly payment that fits within your budget.