There is no general right to buyers' remorse in Texas law, but there are a few specific exceptions that may allow you to return a car. For example, you may be able to return a car if it is sold with a major mechanical defect or if the dealer makes false or misleading statements about the car. You may also be able to return a car if you bought it from a used car dealer who failed to disclose a material fact about the car.
In addition, some credit card companies offer purchase protection that may allow you to return a car if you are unhappy with it. The terms and conditions of purchase protection can vary widely from card to card, so be sure to read your credit card agreement carefully.