What Are Car Key Programmers? Car key programmers are devices that can duplicate a transponder within the memory of a car. These are useful for replacing stolen or lost keys. They can also be used to reset the oil service light and tire pressure warning lights and many other functions. https://carlocksmith79467.educationalimpactblog.com/51737368/what-is-car-keys-programmed-what-are-the-benefits-and-how-to-use-it