Dorman 904-5602 Diesel Exhaust Fluid (DEF) Filler Cap

DEF Filler Cap for OE-Style Replacement

This Dorman DEF filler cap is built to match the fit and function of the original cap on specified vehicles. The blue plastic housing and retention ring are designed for dependable sealing and everyday durability in diesel exhaust fluid service.

• Direct replacement DEF filler cap for specified applications
• Blue plastic construction
• Includes retention ring
• Designed to match original fit and function
• Part number 904-5602 for easy identification

Detailed Product Overview

Dorman 904-5602 is a diesel exhaust fluid (DEF) filler cap made for specific vehicle applications that use an OE-style cap design. It is engineered to align with the original cap’s fit and function, helping maintain a secure closure at the DEF fill point. This part is a practical choice for drivers searching for a replacement DEF filler cap for diesel emissions systems, including vehicle-specific service needs on Ford F-250 and Ford F-350 applications where this style is required. The blue finish helps identify the DEF fill location, and the plastic construction supports routine use in emission control service. Cross-reference part numbers include 572.3008 and 8981202621 for the same application.

Common Issues This Part Can Address

• Broken or missing DEF filler cap
• Worn cap that no longer seats properly
• Damaged retention ring at the fill opening
• Loss of a secure closure at the DEF tank filler neck
• Need for a replacement DEF cap for diesel exhaust fluid service

Installation Notes and Tips

Verify the cap style and OE part number before installation. Clean the DEF fill area before fitting the cap, and confirm the retention ring is seated correctly. For vehicle-specific service, confirm the application matches your Ford F-250 or Ford F-350 configuration and compare the original cap to Dorman 904-5602 before installation.

Quality Assurance

Dorman designs this DEF filler cap to match original equipment fit and function on specified vehicles. The part is engineered for durability and reliable performance in diesel exhaust fluid applications.