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Car Key Cutting Explained Cutting a car key is more than just bending a piece of metal. It is a complicated process that guarantees security, function and long-term use of keys. It is not unusual to lose keys to your car, or even have them break into the lock. You'll need an alternative car key to ensure that you can drive your car at all times. Transponder Keys If your car was manufactured within the last 20 years, it's likely to have transponder chips. These microchips are tiny inside the key's handle which transmit signals to the car's onboard computer when you