The Low Beam Headlight Socket is a high-quality replacement part that fits most Mazda 5, 3, and Protege vehicles. This socket is the part that connects the low beam headlight bulb to the wiring harness, and it is critical for providing power to the bulb. It is made of durable materials and is designed to withstand the high temperatures and vibrations of the engine compartment. This headlight socket is easy to install and is a direct replacement for the factory part 645-540. With a one year unlimited mileage warranty, you can trust that it's built to last. Replace your worn or damaged headlight socket with this high-quality replacement and keep your headlights functioning properly.