Description
The Dorman 904-5301 is a direct-fit replacement diesel exhaust fluid (DEF) filler cap for Ford Super Duty trucks and Transit vans equipped with diesel engines. This cap seals the DEF tank filler neck to prevent contamination and leaks, ensuring proper operation of the selective catalytic reduction (SCR) emissions system. Dorman HD Solutions parts are engineered to match OE fit and function at a competitive price.
Signs You Need a New DEF Filler Cap
- Cracked or broken cap allowing debris into the DEF tank
- DEF warning light illuminated on the dashboard
- Visible crystalline buildup around the filler neck from leaking fluid
- Cap no longer seals or threads securely
- Missing or lost cap during refilling
Specifications
| Manufacturer | Dorman HD Solutions |
|---|---|
| Part Number | 904-5301 |
| Part Type | DEF Filler Cap |
| Material | Plastic |
| Color | Blue |
| Includes | Retention Ring |
| Weight | 0.12 lbs |
Cross References
This part replaces or is equivalent to the following part numbers:
- Ford: AU5Z-5K204-A
- Motorad: DEF101
Applications
This DEF filler cap fits Ford diesel vehicles including:
- Ford F-250 Super Duty 6.7L Powerstroke (2010-2018)
- Ford F-350 Super Duty 6.7L Powerstroke (2010-2018)
- Ford F-450 Super Duty 6.7L Powerstroke (2010-2018)
- Ford F-550 Super Duty 6.7L Powerstroke (2010-2018)
- Ford F-650 / F-750 (2010-2012)
- Ford E-350 / E-450 Super Duty (2010)
- Ford Transit / Transit-150 / Transit-250 / Transit-350 3.2L (2015-2020)
- Ford F-150 3.0L Powerstroke (2018)
Verify your vehicle’s DEF system configuration before ordering to confirm fitment.
