Dorman 904-5401 Diesel Exhaust Fluid (DEF) Filler Cap

Overview of the Dorman 904-5401 DEF Filler Cap

The Dorman 904-5401 Diesel Exhaust Fluid (DEF) Filler Cap is designed specifically for select diesel vehicles requiring a reliable and durable DEF system component. Constructed from blue plastic, this cap ensures a secure seal to maintain the integrity of the DEF tank and prevent contamination.

• Made from durable blue plastic material for corrosion resistance
• Specific fitment designed for compatible diesel vehicle models
• Includes a retention ring for secure installation
• Color-coded blue housing for easy identification
• Part number 904-5401 for precise replacement matching

Detailed Product Description

The Dorman 904-5401 DEF Filler Cap is engineered to meet the exact specifications required by diesel exhaust fluid systems. Its plastic construction offers resistance to chemical exposure and environmental factors, helping to maintain the DEF fluid's purity. The blue color housing aligns with industry standards for DEF components, facilitating quick recognition during maintenance. This cap is a specific fit part, ensuring compatibility with designated diesel vehicle makes and models, which helps prevent leaks and system errors related to improper sealing.

Common Applications and Problem Resolution

• Prevents DEF fluid contamination from dirt and debris
• Eliminates DEF tank leaks caused by worn or damaged caps
• Maintains proper pressure and sealing within the DEF system
• Helps avoid dashboard warning lights related to DEF system faults
• Supports compliance with emission control regulations by preserving DEF fluid quality

Installation Notes and Tips

When installing the Dorman 904-5401 DEF Filler Cap, ensure the retention ring is properly seated to secure the cap firmly in place. Clean the filler neck area before installation to avoid contamination. This part is designed for specific diesel vehicle models, so verify compatibility with your vehicle’s make and model prior to installation to ensure proper fit and function.

Quality Assurance and Warranty

Dorman manufactures the 904-5401 DEF Filler Cap to meet industry standards for emission control hardware. The plastic material is selected for durability and chemical resistance, supporting long-term performance. While specific warranty details are not provided, Dorman parts typically come with a limited warranty covering defects in material and workmanship.