Dorman 904-5701 Heavy Duty Diesel Exhaust Fluid DEF Filler Cap

The Dorman 904-5701 is a heavy-duty diesel exhaust fluid (DEF) filler cap engineered to effectively prevent DEF from leaking or spilling through the filler neck. This replacement cap is designed to match the fit and function of the original equipment cap, restoring proper operation to the diesel emissions fluid system and helping keep pollutants out of the environment.

Key Features:

• Direct replacement design matches OEM fit and function for specified heavy-duty applications
• Durable plastic construction ensures reliable performance and long service life
• Prevents DEF leaks and spills that can compromise emissions system operation
• Includes retention ring for secure installation
• Restores functionality to worn, damaged, or failed original caps
• Backed by over a century of Dorman automotive aftermarket experience

This replacement DEF cap is constructed from quality materials to withstand the demands of heavy-duty diesel applications. Whether replacing a leaking cap or one that has failed due to wear, the Dorman 904-5701 provides a reliable, cost-effective solution for maintaining proper diesel emissions fluid system integrity.