i purchased my car with only one key and remote and i recently lost it and had to have a locksmith come make me a new one. i just purchased two new key fops and was only able to program one of them. i went back to the place and exchanged it thinking that it was the remote. well, the new one would not work either and the store guaranteed that they are in brand new working condition. i looked it up and i believe the reason is because only 3 can be programed to the ECU and the previous owner lost the first one, i lost the second one, and i just programed the third so that is why the other one would not work. my question is, is there a way to reprogram or reset the ECU so i could start fresh and reprogram the key fops? i went to mazda but the guy threw my issue away and blamed it on the remote and would refuse to answer my question.