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Types of Keys For Trucks In the mid to late 90's, companies started putting a transponder chip in the head of their keys. The chip emits a signal that is read by the receiver in your ignition. If the code isn't compatible, the car won't start. Beishir can make these "chip keys" at a fraction the cost of dealers. Transponder Keys A transponder, also known as an immobilizer or chip key, is a tiny electronic chip that is embedded within the head of an automobile key. It has an individual code. When the key