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How to Use Automotive Keys Properly Automotive keys are available in various styles. Certain keys have transponder chips incorporated into their heads. Others are flat and operate mechanically by means of grooves on the tops and bottoms. Early car keys were easy to copy, but manufacturers later added a chip that stored a unique “password” for your vehicle. This adds an extra layer of security against theft. Transponder key A transponder or chip key is a special key for cars that has a microchip embedded in its h