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How to Use Automotive Keys Properly There are many different styles of keys for cars. Some of them have transponder chips on their heads, while others are flat and work mechanically by utilizing grooves on their tops and bottoms. The first car key technology was simple to duplicate, but later, manufacturers introduced chips that could store the unique "password" for your vehicle. This is an extra layer of protection against theft. Transponder key A transponder or chip key is a specific key fo