In some jurisdictions, there may also be consumer protection laws that provide you with the right to return a used car if it has significant issues that were not disclosed to you. These laws vary by jurisdiction, so it's important to research the laws in your area to determine your rights.
If you're considering returning a used car to a dealership, it's a good idea to first contact the dealership and discuss your concerns. They may be willing to work with you to resolve the issues without the need to return the car. If you decide to return the car, be sure to follow the dealership's return procedures and provide any necessary documentation, such as the purchase agreement and any repair orders.