Located inside the doors, the power door lock actuator controls the locks on your vehicle. Each door contains its own actuator, if a door on your vehicle will not lock or unlock, a bad actuator is likely the problem, and a failed door lock actuator may produce a noise. FAERSI Door Lock Actuator is made with high-quality plastic and identical in fit, form and function to the original, realizing direct replacement & easy to install features. A door lock actuator is limited to only one door, so please check the position before purchasing.