What Are Car Key Programmers? The car key programmers are able to copy the transponder from a vehicle. These can be used to replace keys that have been lost or stolen. They can also be used to reset the oil service light, tire pressure warning light and many more functions. https://g28carkeysolutions83978.liberty-blog.com/29354003/your-family-will-be-thankful-for-having-this-car-key-reprogramming