Dorman 904-643 Diesel Exhaust Fluid (DEF) Heater

Overview of Dorman Diesel Exhaust Fluid Heater 904-643

The Dorman Diesel Exhaust Fluid (DEF) Heater 904-643 is designed specifically for Ford Transit models, including Transit-150, Transit-250, Transit-350, and Transit-350 HD. This DEF heater ensures optimal fluid temperature for efficient emission control in cold conditions.

• Compatible with Ford Transit-150, Transit-250, Transit-350, and Transit-350 HD
• Specific fitment for precise installation
• Black plastic housing with a 4.3-inch inside diameter
• Includes one electrical connector with seven terminals
• O-ring type inlet and outlet fittings for secure sealing
• Electronic level sensor integrated
• Mounting hardware included for convenience

Detailed Product Description

The Dorman 904-643 Diesel Exhaust Fluid Heater is engineered to maintain DEF at optimal temperatures, preventing freezing and ensuring proper emission system function. The heater features a durable black plastic housing measuring 10 inches in height, designed to withstand harsh under-hood environments. It includes a single female electrical connector with seven male terminals, providing reliable electrical connectivity. The inlet and outlet fittings utilize O-ring seals to prevent leaks and maintain system integrity. This specific fit part is tailored for Ford Transit models, ensuring compatibility and ease of installation.

Common Applications and Problem Resolution

• Prevents DEF freezing in cold weather conditions
• Maintains proper DEF temperature for emission system efficiency
• Reduces risk of emission system faults related to DEF heater failure
• Ensures compliance with emission control standards
• Supports reliable operation of Ford Transit diesel engines

Installation Notes and Tips

When installing the Dorman 904-643 DEF Heater, ensure the electrical connector is securely attached and the O-ring seals are properly seated to prevent leaks. Verify compatibility with your specific Ford Transit model before installation. The included mounting hardware facilitates a straightforward replacement process. It is recommended to inspect the DEF lines and connectors for damage during installation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The 904-643 DEF Heater undergoes rigorous quality control to ensure proper fit and function. Please refer to Dorman's warranty policy for specific coverage details.