Dorman 904-5401 Diesel Exhaust Fluid (DEF) Filler Cap
OE Quality 60-Day Returns
Dorman

Dorman 904-5401 Diesel Exhaust Fluid (DEF) Filler Cap

Brand Dorman 904-5401
Material Plastic
Material Plástico
Color Azul
Color Blue
Universal Or Specific Fit Específico
Universal Or Specific Fit Specific
Contenidos del paquete Anillo de retención
Housing Color Azul
Housing Color Blue
Package Contents Retention ring
Fits —

OE-style fit. Matches the original cap’s fit and function for straightforward replacement.

Durable plastic construction. Built for reliable performance in everyday use.

DEF filler cap. A direct replacement cap for diesel exhaust fluid systems.

Cross-references 572.3005 and 908022301 for the same application. See all 2.

$37.16Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $37.16
Free shipping to the continental U.S.
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 Cap options

DEF Filler Cap for Specific Vehicles

The Dorman 904-5401 diesel exhaust fluid (DEF) filler cap is a specific-fit replacement for the original cap used on selected vehicles. It is built from plastic with a blue housing color and is designed to match the fit and function of the OE part for reliable sealing at the DEF fill point.

Use this Dorman DEF filler cap when servicing diesel exhaust fluid systems on vehicles that require a direct replacement cap. The part number 904-5401 is also referenced for cross-checking during catalog lookup and parts verification.

Key Features

  • Direct replacement DEF filler cap for specific applications
  • Plastic construction for everyday service use
  • Blue housing color for easy identification at the fill location
  • Engineered to match original fit and function
  • Retention ring listed in package contents
  • Specific fit design for selected vehicle applications

Detailed Description

Dorman 904-5401 is a diesel exhaust fluid filler cap made to replace the original cap on specified vehicles without changing the factory-style fit. It is intended for diesel emission control service where a secure DEF fill cap is needed to help maintain the system’s normal sealing and access point. This part cross-references Monroe Shocks & Struts (e.g., 572.3005, 908022301) for the same application. For buyers searching DEF filler cap replacement for Ford F-250, Ford F-350, or Ford Super Duty service needs, this part number can help narrow the correct OE-style match.

What It Helps Address

  • Broken or missing DEF filler cap
  • Worn cap that no longer seats properly
  • DEF fill opening exposed to dirt and moisture
  • Need for a direct-fit replacement during emission system service
  • Identification issues when replacing a blue DEF cap on diesel vehicles

Installation Notes and Tips

Confirm the vehicle uses the correct DEF filler cap style before installation. Compare the original cap shape, retention features, and fill opening design to Dorman 904-5401. For fitment-based searches, use phrases such as DEF filler cap for specific diesel applications, direct replacement DEF cap, and OE-style DEF cap replacement for Ford Super Duty trucks. If the original retention ring is damaged or missing, inspect the fill neck and surrounding components before installing the new cap.

Quality Assurance

Dorman designs this cap to match original fit and function and builds it for durable, reliable performance in diesel exhaust fluid service.

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 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
572.3005908022301