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How to Use Automotive Keys Properly Automotive keys are available in different styles. Some include transponder chips in their heads, whereas others are flat and work mechanically through grooves on the tops and bottoms. The first car keys were simple to duplicate, however 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 specific key for cars with a