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The primary issues with the 2012 Hyundai Tucson door locks involve early actuator failure and blown fuses. The door lock actuator functions as a motor, or a solenoid in some models, with gears that control the door lock mechanism. Typically, these problems are isolated to a single door on most occasions. Some vehicles have a cable linking the door lock actuator to the inner door handle integrated into the actuator assembly. If this cable breaks and is not replaceable on its own, the entire door lock actuator may need to be substituted.
The primary issues seen with the 2012 Hyundai Tucson door locks are early actuator malfunction and fuse blowouts.