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Types of Keys For Trucks In the mid to late 90's, companies began putting transponder chips in the plastic head of their keys. The chip emits a signal which is interpreted by the receiver in your ignition. If the code isn't compatible, the car won't start. Beishir can produce these "chip keys" at a fraction the cost of a dealer. Transponder Keys A transponder, also called immobilizer or chip key is a tiny microchip that is embedded within the head of an automobile key. It ha