Dorman 904-5502 Diesel Exhaust Fluid (DEF) Filler Cap

Durable Dorman Diesel Exhaust Fluid Filler Cap

The Dorman 904-5502 Diesel Exhaust Fluid (DEF) Filler Cap is designed for specific vehicle applications requiring a reliable and secure DEF system component. Constructed from durable blue plastic, this cap ensures proper sealing and protection of the DEF tank, helping maintain emission control system integrity.

• Made from high-quality blue plastic for corrosion resistance
• Specific fitment designed for select diesel vehicle models
• Includes retention ring and keys for secure installation
• Blue housing color for easy identification
• Part number 904-5502 ensures exact replacement compatibility

Product Details and Features

This Dorman DEF filler cap (part number 904-5502) is engineered to meet the precise requirements of diesel emission control systems. The plastic material offers durability against chemical exposure from DEF fluid, while the blue color housing aligns with industry standards for DEF components. The included retention ring and keys provide a secure fit, preventing contamination and fluid loss. This cap is a specific fit, designed to replace original equipment on compatible diesel vehicles, ensuring proper DEF system operation.

Applications and Problem Solving

• Prevents DEF fluid contamination and evaporation
• Maintains proper DEF tank pressure and sealing
• Replaces damaged or lost DEF filler caps on compatible diesel trucks
• Helps avoid emission system faults related to DEF tank leaks
• Ensures compliance with emission control regulations

Installation Notes and Tips

Installation of the Dorman 904-5502 DEF filler cap is straightforward with the included retention ring and keys. Ensure the DEF tank opening is clean before installation to prevent debris contamination. Align the cap properly and secure it using the retention ring to maintain a tight seal. Refer to the vehicle’s service manual for specific DEF system maintenance procedures.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit and function. The 904-5502 DEF filler cap undergoes quality checks to ensure durability and compatibility. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship to provide confidence in product reliability.