The TYC 20-6398-90 Headlight Assembly is engineered to provide a reliable and efficient lighting solution for the left side of 2003-2006 Ford Expedition models. This assembly is designed to meet or exceed SAE/DOT standards, ensuring compliance with FMVSS 108 regulations for photometry and safety. Constructed with high-quality materials, it features a black housing and clear lens, offering both durability and a sleek appearance. The assembly includes halogen bulbs for both low and high beams, as well as a front signal light bulb, facilitating a straightforward replacement process. Designed with OE-comparable fasteners and mounting tabs, the TYC 20-6398-90 ensures precise fitment and hassle-free installation, eliminating the need for vehicle modifications. The lens is treated with a special coating to prevent hazing and fading, maintaining optimal illumination and safety over time. This headlight assembly undergoes rigorous cycling tests to guarantee long-lasting quality and performance, making it a dependable choice for fleet operations seeking to maintain vehicle safety and visibility.