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Types of Keys For Trucks In the mid- to late 90's, companies began putting transponder chips in the head of their keys. This chip emits a signal that is read by the receiver inside your ignition; if the code doesn't match, the car won't start. These are often referred to as "chip keys." Beishir can make these for you at less than the cost of a dealer. Transponder Keys A transponder key, also referred to as a chip key or an immobilizer key, is a tiny electronic