What Are Car Key Programmers? The car key programmers are able to copy the transponder from the vehicle. These can be used to replace keys that have been lost or stolen. They can also be used to reset oil service light and warning lights for tire pressure and other functions. https://car-locksmiths61002.angelinsblog.com/28921971/the-time-has-come-to-expand-your-car-keys-programmed-options