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How to Use Automotive Keys Properly There are a variety of styles of automotive keys. Some have transponder chips inside their heads, while others are flat and work mechanically through grooves on the tops and bottoms. Car keys of the past were easy to duplicate, however manufacturers later introduced a chip that stored a unique “password” for your car. This adds an extra layer of protection against theft. , also known as a chip key, is a special car key that is equipped with