The TYC 20-5964-90-1 Headlight Assembly is engineered to provide reliable illumination for the 2001-2004 Nissan Frontier, specifically designed for the left-hand side. This assembly ensures compliance with DOT/SAE standards, meeting or exceeding FMVSS 108 requirements for photometry and safety. Manufactured in facilities certified to ISO9001:2000 and QS9000 standards, it guarantees precision and durability. The assembly includes halogen bulbs and features a plastic lens with a special coating to prevent hazing and fading, maintaining optimal light output over time. Designed for easy installation, it utilizes OE-comparable fasteners and mounting tabs, ensuring a precise fit without the need for vehicle modifications. This headlight assembly offers a cost-effective solution for fleet operators seeking dependable lighting components that adhere to industry standards and provide long-term performance.