Having buyer's remorse over a car purchase? Most of the time, you'll just have to live with it, but there may be some circumstances where you can persuade a dealer to take a car back.
Under most circumstances, a dealer has no legal obligation to take a car back. If you're having regrets, you can try setting up a meeting with the dealership manager and calmly making your case. Especially if you're acting on behalf of someone else, such as a college-aged child or aging parent, they may consider cancelling the purchase.
However, if your buyer's remorse comes down to payments that are higher than you can afford, you're probably out of luck. The dealer may be willing to consider a trade down to a less expensive model, but chances are slim.
On the other hand, if your reason for wanting a return comes down to mechanical problems or because you feel you were generally ripped off on the price of a vehicle, you may have recourse under state laws.