What Are Car Key Programmers? Car key programmers are devices that replicate a transponder into the memory of a car. They are useful for replacing keys that are stolen or lost. They can also be used to reset the oil service light, tire pressure warning light and many other functions. https://auto-locksmith84057.oblogation.com/28989992/what-to-look-for-to-determine-if-you-re-ready-for-car-keys-programmed