Car Key Reprogramming Reprogramming a car key involves programming the chip blank on an original key to make it compatible for your vehicle. It's much more efficient than buying a new key from the dealer and can save you money. This process is usually carried out by an expert locksmith. https://g2874607.suomiblog.com/what-the-10-most-worst-car-key-programmer-fails-of-all-time-could-have-been-prevented-45036870