Dorman 904-379 Diesel Exhaust Fluid (DEF) Heater

Overview of Dorman Diesel Exhaust Fluid Heater 904-379

The Dorman 904-379 Diesel Exhaust Fluid (DEF) Heater is engineered specifically for Mercedes-Benz Sprinter 2500 and Sprinter 3500 models. Designed to maintain optimal DEF temperature, this component ensures proper emission control system performance in cold conditions.

• Compatible with Mercedes-Benz Sprinter 2500 and Sprinter 3500
• Black plastic housing and hose for durability and corrosion resistance
• Hose inside diameter of 115 mm and length of 85 mm
• Equipped with two electrical connectors and four terminal connections
• Plastic hose fittings with male ends on both sides for secure connections
• Specific fitment designed for precise installation and function

Detailed Product Description

The Dorman 904-379 DEF Heater features a robust black plastic housing and hose construction, providing resistance to harsh environmental factors and chemical exposure from diesel exhaust fluid. The hose has an inside diameter of 115 mm and a length of 85 mm, with both ends fitted with male plastic connectors to ensure a tight, leak-free seal. The heater includes two electrical connectors with four terminals, facilitating reliable electrical connections necessary for efficient heating operation. This part is a specific fit for Mercedes-Benz Sprinter 2500 and Sprinter 3500 models, ensuring compatibility and ease of installation.

Common Applications and Problem Resolution

• Prevents DEF freezing in cold weather conditions
• Maintains proper DEF fluid temperature for emission system compliance
• Reduces risk of emission system faults related to DEF temperature
• Supports efficient operation of selective catalytic reduction (SCR) systems
• Helps avoid engine derate or limp mode caused by DEF system errors

Installation Notes and Tips

When installing the Dorman 904-379 DEF Heater on Mercedes-Benz Sprinter 2500 or 3500 vehicles, ensure all electrical connections are secure and free of corrosion. Verify that the hose fittings are properly seated with male ends connected to corresponding female fittings to prevent leaks. Follow manufacturer torque specifications and safety procedures during installation. Testing the heater function after installation is recommended to confirm proper operation before vehicle use.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 904-379 DEF Heater undergoes rigorous quality control to ensure durability and reliable performance in emission control systems. Warranty coverage details should be confirmed with the product documentation or supplier, as warranty terms may vary.