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What Is Car Key Programming? Modern car keys aren't just simple pieces of metal. They are equipped with a computer chip inside that connects to your vehicle. This communication is essential to ensure your vehicle's security and prevent unauthorized use. However, you must preprogram your keys prior to allowing them to work with your vehicle. This is a task best left to the professionals. Security Contrary to the older keys for cars made of metal Modern cars use transponder chips to unlock and start the engine. This techno