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Types of Keys For Trucks Around the mid to late 90's, key manufacturers began placing a transponder chip in the head of their keys. This chip emits a signal which is read by the receiver in your ignition; if the code doesn't match the code, your car won't start. They are also known as "chip keys." Beishir can make these for you at less than the cost of a dealer. Transponder Keys A transponder, also known as immobilizer or chip key, is a tiny microch