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Types of Keys For Trucks Around the mid to late 90's, companies began putting transponder chips inside the head of their keys. The chip emits a signal that is received by the receiver in your ignition; if the code isn't in sync, the car won't start. Beishir is able to produce these "chip keys" at a fraction the price of a dealer. Transponder Keys A transponder key, also known as chip keys or an immobilizer key, is a small electronic microchip inside the head of the car key that has an individual code. When the key i