Dorman 904-608 Diesel Exhaust Fluid (DEF) Pump

Reliable Diesel Exhaust Fluid Pump for Mercedes-Benz and Volkswagen

The Dorman 904-608 Diesel Exhaust Fluid (DEF) Pump is engineered to meet the emission control needs of select Mercedes-Benz and Volkswagen models. Designed with durable plastic housing and precise terminal configurations, this DEF pump ensures consistent performance in your vehicle's emission system.

• Compatible with Mercedes-Benz E250, GL320, GL350, ML250, ML320, ML350, R350, S350, and Volkswagen Passat, Sprinter 2500, Sprinter 3500, Touareg
• Durable black plastic housing for corrosion resistance
• Includes mounting hardware for straightforward installation
• Multiple blade terminal types with female connectors for secure electrical connections
• Two inlet ports and one outlet port for efficient fluid flow

Product Features and Specifications

The Dorman 904-608 DEF pump features a robust plastic housing designed to withstand harsh under-hood environments. It includes five blade terminals on End 1, two on End 2, and three on End 3, all with female connector genders to ensure compatibility with factory wiring harnesses. The pump has two inlet ports and one outlet port, facilitating proper diesel exhaust fluid circulation. Mounting hardware is included to simplify the replacement process.

Purpose and Common Applications

This diesel exhaust fluid pump is essential for maintaining the selective catalytic reduction (SCR) system in diesel vehicles, helping reduce nitrogen oxide emissions. It is commonly used to address issues such as:

• DEF pump failure causing emission system warnings
• Inconsistent or no DEF fluid delivery to the SCR catalyst
• Electrical connection problems due to worn terminals
• Leaks or damage in the pump housing affecting fluid flow
• Malfunctioning DEF system leading to reduced engine performance

Installation Notes and Tips

When installing the Dorman 904-608 DEF pump, ensure the vehicle is turned off and the battery is disconnected to prevent electrical hazards. Use the included mounting hardware to secure the pump firmly in place. Verify all blade terminals are properly connected with female connectors to avoid electrical faults. It is recommended to inspect the DEF lines for any blockages or damage during installation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance for emission control components. The 904-608 DEF pump undergoes rigorous quality checks to ensure durability and functionality. Please refer to Dorman's warranty policy for specific coverage details.