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How to Use Automotive Keys Properly Automotive keys are available in different styles. Some of them have transponder chips on their heads, whereas others are flat and work mechanically through grooves on the tops and bottoms. Car keys of the past were simple to duplicate, but later, manufacturers added chips that could store a unique "password" for your car. This is an additional layer of protection against theft. Transponder key A transponder, also known as a chip key, is a special key for cars with an embedded microchip in its head.
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