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Types of Keys For Trucks Around the mid to late 90's, companies started putting a transponder chip in the head of their keys. This chip emits a signal which is interpreted by the receiver inside your ignition; if the code isn't compatible the car's code, it won't begin. Beishir can produce these "chip keys" at a fraction of the cost of dealers. Transponder Keys A transponder, also called an immobilizer or chip key is a tiny electronic microchip that is embedded within the head of a