Dorman 904-064 Diesel Exhaust Fluid (DEF) Filler Neck

DEF Filler Neck for Ford Super Duty

Dorman 904-064 is a diesel exhaust fluid (DEF) filler neck for select Ford Super Duty diesel trucks. It matches the fit of the original filler neck on 2011-2016 Ford F-250 Super Duty and 2011-2016 Ford F-350 Super Duty applications, helping restore a secure DEF fill path from the fill point to the tank.

Built with steel, plastic, and rubber components in black, this DEF filler neck is made for direct replacement use on the specified Ford F-250 Super Duty and Ford F-350 Super Duty models. Part number 904-064 is a practical OE-style solution when the original neck is cracked, leaking, or no longer sealing properly.

Key Features

• Direct replacement DEF filler neck for select Ford Super Duty diesel trucks
• Fits 2011-2016 Ford F-250 Super Duty and 2011-2016 Ford F-350 Super Duty
• Constructed from steel, plastic, and rubber
• Black finish
• Bolt-on attachment method
• Cap not included
• Mounting hardware not included
• Part number 904-064

Detailed Description

Dorman 904-064 is engineered to match the original filler neck dimensions and mounting style on compatible Ford diesel applications. It is designed to provide a reliable transfer path for DEF from the fill point to the DEF tank, which is important when the factory neck has failed, is leaking, or no longer fits securely. For buyers searching for a DEF filler neck for Ford F-250 Super Duty 2011-2016 or a DEF filler neck for Ford F-350 Super Duty 2011-2016, this replacement part offers the correct vehicle-specific fit.

This part cross-references Ford BC3Z5J232A for the same application.

What It Helps Fix

• DEF leaks at the filler neck
• Cracked or damaged filler neck assemblies
• Poor sealing at the fill point
• Loose or unstable DEF transfer path
• Failed original neck on Ford Super Duty diesel trucks

Installation Notes and Tips

Verify vehicle fitment by year and model before installation. This part uses a bolt-on attachment method and is intended for direct replacement of the original filler neck on the listed Ford applications. Inspect the surrounding DEF fill components, seals, and mounting points for wear or damage before reassembly.

Quality Assurance

Dorman manufactures replacement emission control components to match original fit and function on specified vehicles. Part 904-064 is built for the listed Ford Super Duty applications and follows the OE-style replacement approach used across Dorman’s emission component lineup.