These laws give new car buyers a certain period of time to return their vehicle. The time frame can vary, but it's typically three to seven days. However, keep in mind that these laws only apply to new cars, and they may have certain restrictions. For instance, the car might need to have less than a certain mileage, and you may have to pay a restocking fee. If you're not sure if your state has cooling-off laws, it's a good idea to do a quick internet search or consult with a local consumer protection agency.