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

Reliable Diesel Exhaust Fluid Filler Cap Replacement

The Dorman 904-5401CD Diesel Exhaust Fluid (DEF) Filler Cap is designed to maintain the integrity of your vehicle's DEF system. Featuring a retention ring, this cap ensures a secure fit to prevent contamination and fluid loss in diesel-powered vehicles.

• Includes a retention ring for secure attachment
• Compatible with various diesel vehicle models requiring DEF filler caps
• Durable construction to withstand harsh under-hood conditions
• Part number 904-5401CD for precise identification and replacement

Product Details and Features

The Dorman 904-5401CD DEF Filler Cap is engineered to provide a tight seal on the DEF tank, helping to protect the diesel exhaust fluid from dirt, debris, and evaporation. The included retention ring enhances the cap’s stability, reducing the risk of accidental loss during refilling or maintenance. This part is essential for maintaining proper DEF system function, which is critical for emissions control in diesel vehicles.

Applications and Common Issues Addressed

• Prevents DEF fluid contamination from external debris
• Stops DEF fluid evaporation and leakage
• Ensures compliance with emissions control system requirements
• Replaces worn or damaged DEF filler caps causing warning lights or system errors
• Helps maintain proper DEF tank pressure and fluid levels

Installation Notes and Tips

When installing the Dorman 904-5401CD DEF Filler Cap, ensure the retention ring is properly seated to secure the cap firmly in place. Clean the filler neck before installation to avoid contamination. Tighten the cap until it clicks or seats firmly to prevent leaks. This part is compatible with diesel vehicles equipped with DEF systems, including popular makes and models that require a DEF filler cap replacement.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The 904-5401CD DEF Filler Cap undergoes quality checks to ensure proper fit and function. Please refer to Dorman’s warranty policy for specific coverage details.