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

DEF Filler Cap for Ram Diesel Applications

This Dorman DEF filler cap is a direct-fit replacement for specified Ram diesel trucks. Built from plastic with a blue housing color and a retention ring, it is made to match the original cap’s fit and function on supported vehicles.

• Direct replacement DEF filler cap for specified Ram 2500 and Ram 3500 models
• Plastic construction for durable everyday use
• Blue housing color for OE-style appearance
• Specific fit design for the listed applications
• Package contents include a retention ring

Fitment Details

Compatible with 2010 Dodge Ram 2500, N/A; 2010 Dodge Ram 3500, N/A; 2011-2012 Ram 2500, N/A; and 2011-2012 Ram 3500, N/A. Part number 904-5701 is intended for these exact diesel exhaust fluid filler cap applications.

This part cross-references 572.3009 and 52122496AA for the same application.

What This Part Helps Address

• Broken or missing DEF filler cap
• Loose or damaged cap that no longer seals properly
• Worn cap components on diesel exhaust fluid fill points
• Replacement needs after cap loss or physical damage

Installation Notes and Tips

Verify the vehicle year, make, and model before installation. Confirm the DEF fill opening matches the original cap design and retain the retention ring during service. Part number 904-5701 is a specific-fit replacement, so it should be matched to the listed Ram diesel applications only.

Quality Assurance

Dorman engineers this DEF filler cap to match the original cap’s fit and function on the specified vehicles, with durability and reliable performance as the design focus. Part number 904-5701 is built as an OE-style replacement for the listed Ram diesel truck applications.