Dorman 904-5701CD Diesel Exhaust Fluid (DEF) Filler Cap

DEF Filler Cap for Ram Diesel Applications

This Dorman DEF filler cap is built to match the original cap’s fit and function on select Ram diesel trucks. It is a direct replacement for worn, missing, or damaged DEF tank caps, with a design focused on durability and dependable sealing performance.

Compatible with 2010 Dodge Ram 2500, 2010 Dodge Ram 3500, 2011-2012 Ram 2500, and 2011-2012 Ram 3500. Part number 904-5701CD is a practical OE-style replacement for diesel exhaust fluid service points on these vehicles.

Key Features

• Direct replacement DEF filler cap for specified Ram and Dodge Ram diesel models
• Engineered to match original fit and function
• Built for durable, reliable performance in DEF service use
• Package contents include retention ring
• Cross-reference part numbers include 572.3009 and 52122496AA

Product Details

The Dorman 904-5701CD diesel exhaust fluid filler cap is designed for drivers who need a replacement cap that installs in the original location and performs like the factory part. It helps maintain a secure closure at the DEF fill point, which is important for keeping the system clean and ready for service. This part is a fit for 2010 Dodge Ram 2500 and Ram 3500, plus 2011-2012 Ram 2500 and Ram 3500 diesel applications.

Common Issues It Can Help Solve

• Missing or lost DEF filler cap
• Cracked or damaged cap body
• Loose or poor-fitting cap at the DEF fill opening
• DEF tank opening left exposed to dirt and debris
• Need for an OE-style replacement on Ram 2500 and Ram 3500 diesel trucks

Installation Notes

Install the cap at the DEF filler opening and confirm the retention ring is properly seated. Verify the cap closes securely and matches the original style before returning the vehicle to service. For fitment confirmation, match the vehicle year, make, and model exactly to the listed applications for 2010 Dodge Ram 2500, 2010 Dodge Ram 3500, 2011-2012 Ram 2500, and 2011-2012 Ram 3500.

Quality Assurance

Dorman designs this DEF filler cap to match original equipment fit and function on the listed Ram diesel applications. Part number 904-5701CD is engineered for dependable service as a replacement for the factory DEF cap.