No, it is not illegal to sell a car for parts. As long as you own the vehicle, then you can sell the parts without any issues. Stolen cars are often parted out, so the process, in general, can sometimes get a bad rap. However, as long as you are the rightful owner, then you can remove parts and sell them individually with no problem. If you own the car but don't have a title, then parting it out can be a great option for selling a car without a title.