Dorman 904-5555 Diesel Exhaust Fluid (DEF) Injector Gasket

Durable Diesel Exhaust Fluid Injector Gasket for Precise Sealing

The Dorman 904-5555 Diesel Exhaust Fluid (DEF) Injector Gasket is engineered to provide a reliable seal for DEF injectors in diesel vehicles. Designed with specific fitment in mind, this steel gasket ensures proper exhaust fluid injection system performance and helps maintain emission control standards.

• Constructed from durable steel material for long-lasting use
• Measures 3.26 inches in length and 0.35 inches in thickness for exact fit
• Features two mounting holes for secure installation
• Grey color for easy identification during service
• Sold as a single injector gasket, part number 904-5555

Product Details and Specifications

The Dorman 904-5555 DEF Injector Gasket is specifically designed to fit diesel exhaust fluid injection systems requiring a precise seal. Its steel construction offers resistance to heat and corrosion, critical for maintaining the integrity of the emission control system. The gasket’s 3.26-inch length and 0.35-inch thickness provide a tight seal around the injector, preventing leaks and ensuring optimal DEF delivery. The two mounting holes align with factory specifications to facilitate proper installation and secure fitment.

Common Applications and Problem Resolution

• Prevents DEF injector leaks that can cause emission system faults
• Eliminates exhaust fluid seepage that may lead to injector damage
• Helps maintain proper DEF system pressure and flow
• Addresses issues related to gasket wear or failure in diesel vehicles
• Supports compliance with emission regulations by ensuring system integrity

Installation Notes and Tips

When replacing the DEF injector gasket, ensure the mounting surfaces are clean and free of debris to achieve a proper seal. Align the gasket’s two mounting holes with the injector and manifold to avoid misalignment. Use the Dorman 904-5555 gasket as a direct replacement for specific diesel vehicle models requiring this part number. Avoid reusing old gaskets to prevent leaks and system malfunctions.

Quality Assurance and Warranty Information

Dorman manufactures the 904-5555 DEF Injector Gasket to meet or exceed OEM standards for emission control components. The steel material and precise dimensions contribute to consistent performance and durability. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in material and workmanship.