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How to Use Automotive Keys Properly Automotive keys are available in various styles. Certain keys have transponder chips in their heads. Others are flat and operate mechanically by means of grooves on tops and bottoms. Car keys of the past were easy to copy, but manufacturers later added a chip that stored a unique “password” for your car. This adds an extra layer of protection against theft. Transponder key A transponder or chip key is a specific key for cars with a microchip embedded within its head. This technology is utilized in all modern au