Dorman 904-7938 Diesel Exhaust Fluid (DEF) Filler Neck Filter
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Dorman

Dorman 904-7938 Diesel Exhaust Fluid (DEF) Filler Neck Filter

Brand Dorman 904-7938
Material Plastic
Attachment Method Clip on
Color Black
Length 7.5 in
Package Contents 1 diesel exhaust fluid filler neck
Width 1.9 in
Fits —

OE direct replacement. Matches the original filter's fit and function for straightforward service.

Durable plastic construction. Built for reliable performance in emission system use.

Clip-on attachment. Installs securely without complicated hardware.

Cross-references 82269261 for the same application. See all 1.

$63.79Free shipping
In stock · usually ships same day before 1pm CST
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Step 2 — Quantity
Order total $63.79
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Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Diesel Exhaust Fluid (DEF) Filler Neck Filter options

DEF Filler Neck Filter for Diesel Emission Systems

This Dorman DEF filler neck filter is built to match the fit and function of the original filter on specified vehicles. It is a black plastic, clip-on replacement made for reliable performance in the diesel exhaust fluid fill path, including applications such as Ram 2500 and Ram 3500 service needs where DEF system maintenance matters.

Key Features

  • Direct replacement DEF filler neck filter for emission control service
  • Matches original fit and function on specified vehicles
  • Black plastic construction for everyday underhood durability
  • Clip-on attachment method for secure installation
  • Dimensions: 7.5 in. length and 1.9 in. width
  • Part number 904-7938 for easy identification

Detailed Product Overview

Dorman 904-7938 is a diesel exhaust fluid filler neck filter designed for vehicles that use a DEF fill neck filter in the emission control system. The part is engineered to replicate the original component’s fit and function, helping maintain proper DEF fill-neck operation on specified Ram 2500 and Ram 3500 applications. If you are replacing a worn or damaged DEF filler neck filter, 904-7938 provides a straightforward OE-style service part for diesel emission maintenance.

This part cross-references Chrysler 82269261 for the same application.

Common Issues This Part Can Address

  • Damaged or missing DEF filler neck filter
  • Restricted DEF fill-neck flow caused by a worn filter
  • Contamination concerns at the DEF fill opening
  • Service replacement for a cracked or degraded plastic filter body
  • Emission system maintenance on Ram 2500 and Ram 3500 diesel models

Installation Notes and Tips

Install the filter using the clip-on attachment method and verify the replacement matches the original filler neck layout before service. Confirm vehicle application by part number and inspect the DEF fill area for debris or damage during installation. For best results, compare the old component to Dorman 904-7938 before final assembly.

Quality Assurance

Dorman engineers this DEF filler neck filter to match original equipment fit and function on specified vehicles. Part number 904-7938 is built for dependable service in diesel emission control applications.

This part fits 0 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
82269261