Dorman 904-383 Diesel Exhaust Fluid (DEF) Pump

DEF Pump for Ram 2500 and 3500

This Dorman DEF pump is a direct replacement for select Ram 2500 and Ram 3500 diesel trucks with the 6.7L engine. It is built to restore diesel exhaust fluid circulation, support SCR system operation, and help clear issues tied to a failing factory pump.

Key Features

• Direct replacement diesel exhaust fluid pump for select Ram 2500 and 3500 pickup trucks
• Engineered to match original equipment performance for DEF delivery and circulation
• Uses Tier 1 supplier critical components and factory-spec seals
• 12-volt design with heated construction
• Plastic housing with one female connector, 16 terminals, internal inlet, and quick-connect outlet
• Designed for reliable operation in demanding diesel emissions systems

Detailed Description

Dorman 904-383 is a replacement DEF pump assembly for 2013-2018 Ram 2500 and 2013-2018 Ram 3500 models equipped with the L6 408 6.7L diesel engine. It is engineered and tested to meet strict performance standards so the truck’s selective catalytic reduction system can maintain proper DEF flow and emissions control. If the original pump leaks, fails to circulate DEF, or triggers a check engine light, this replacement is built to restore normal system function.

This part cross-references Mopar and aftermarket OE numbers such as 68085908AH and EM1301DSP for the same application. The Dorman 904-383 is a practical choice when servicing a Ram 2500 DEF pump or replacing a Ram 3500 diesel exhaust fluid pump with a unit built around factory-style seals and critical internal components.

What It Helps Fix

• DEF pump leakage
• Loss of DEF circulation
• Check engine light related to SCR/DEF system faults
• Emissions system performance issues caused by pump failure
• Driveability concerns tied to improper DEF delivery

Installation Notes and Tips

Verify connector style, port layout, and heated configuration before installation. This pump uses one female connector, an internal inlet, and a quick-connect outlet, so matching the original routing is important. Inspect the DEF tank area, seals, and related lines for contamination or damage before installing the replacement pump on your Ram 2500 or Ram 3500.

Quality Assurance

Dorman manufactures this DEF pump to strict engineering, manufacturing, and testing standards for dependable service life. The design uses factory-spec seals and Tier 1 supplier critical components to support consistent performance in diesel emissions applications.