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A Resistor Pellet serves a crucial function in vehicle locks by identifying authorized keys. This small component is embedded within the key and contains a specific resistance value. When the key is inserted into the ignition or lock cylinder, the vehicle’s electronic systems read the resistance value from the pellet. If the value matches what is programmed within the vehicle’s computer system, the lock or ignition system will engage. This mechanism ensures that only keys with the correct resistor value can unlock the vehicle or start the engine, thereby providing a reliable method for security.

While options related to durability, ignition system modification, and protection against unauthorized access may sound relevant, they do not accurately reflect the primary function of a Resistor Pellet in this context. The focus is specifically on the identification of authorized keys, which is essential for preventing unauthorized access and ensuring that only those with the rightful key can operate the vehicle.