What Are Car Key Programmers? Car key programmers are devices that can duplicate a transponder within the memory of a car. These can be used to replace keys that were lost or stolen. They can also be used to reset the oil service light and warning lights for tire pressure, https://g28carkeysolutions10771.theideasblog.com/29709251/a-guide-to-car-key-reprogramming-from-beginning-to-end