What Are Car Key Programmers? The car key programmers can copy the transponder from a vehicle. They are useful to replace stolen or lost keys. They can also be used to reset the oil service light and tire pressure warning lights and other functions. These are typically bidirectional OBD II https://g28-car-key-solutions85680.blogs100.com/29715797/what-car-key-reprogramming-experts-want-you-to-know