I sold a 1999 Mazda 626 in florida with the heads recently redone to someone June 23, 2010. When the car was given to the purchaser a/c was working,car was running fine and car had no check engine light. I drove the car for about a month after fixing it and sold it just for a small profit. The person stated they wanted an agreement that the car was a gift to save money on taxes because they were going through financial difficulty which I wrote up and it stated I gave them the car as a gift and was not responsible for any incidents or accidents with car after june 23 2010. Now the purchaser licensed and insured car and wants a refund for the car because the check engine light came on and this could very well be something as small as a o2 sensor but they refused to have it checked. I do not have the money to give them back and wanted to know if I had sent them a text messaging saying the car has no mechanical issues if that is considered warranty or not? I know she can sue its her right but I want to know my rights as the seller as well....