Dorman 904-5501 Diesel Exhaust Fluid (DEF) Filler Cap

Durable Dorman Diesel Exhaust Fluid Filler Cap

The Dorman 904-5501 Diesel Exhaust Fluid (DEF) Filler Cap is designed to provide a secure seal for your vehicle's DEF tank. Constructed from durable blue plastic, this specific fit cap helps maintain proper DEF system function and prevents contamination.

• Made from high-quality blue plastic for durability and corrosion resistance
• Specific fit design ensures compatibility with designated diesel vehicles
• Includes a retention ring for secure installation and leak prevention
• Blue housing color for easy identification of DEF filler point

Product Details and Specifications

The Dorman 904-5501 DEF filler cap is engineered to meet the exact specifications required for certain diesel vehicle models. Its plastic construction resists chemical degradation from DEF fluid, while the blue color housing aligns with industry standards for DEF components. The included retention ring ensures the cap remains firmly in place, reducing the risk of fluid contamination or evaporation. This part is a specific fit, designed to replace worn or damaged DEF filler caps on compatible diesel trucks and commercial vehicles.

Common Applications and Problem Solving

• Prevents DEF fluid leakage and evaporation
• Protects DEF tank from dirt and debris contamination
• Maintains proper DEF system pressure and function
• Replaces cracked or missing DEF filler caps
• Ensures compliance with emission control requirements

Installation Notes and Tips

When installing the Dorman 904-5501 DEF filler cap, ensure the retention ring is properly seated to secure the cap firmly. Clean the filler neck area before installation to prevent debris from entering the DEF tank. This cap is designed for specific vehicle models; verify compatibility with your diesel truck or commercial vehicle before installation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance in emission control systems. The 904-5501 DEF filler cap undergoes quality checks to ensure durability and fitment accuracy. Please refer to Dorman's warranty policy for coverage details on this part.