Cummins | Paccar DEF Doser | 2871880

Get your diesel engine back to peak performance with this non-air assisted DEF doser, a direct-fit replacement for OEM 2871880 and 4387305.

Built for Cummins and Paccar applications, this dosing module delivers precise DEF injection into the SCR system to control NOx emissions and meet EPA standards. The non-air assisted design reduces complexity, minimizes failure points, and offers easier installation; no compressed air required.

Whether you're experiencing fault codes, reduced power, or DEF system errors, this doser offers a fast, cost-effective fix. Manufactured to OEM specifications for quality and durability, it’s trusted by fleet managers and technicians across the country.

In stock and ready to ship from American Radiator, this DEF doser comes backed by a 1-year warranty and expert support to help keep your truck or equipment running clean and compliant.

Order now and avoid costly downtime with a reliable emissions solution that performs when it counts.