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2871878NX
Doser Injector
Cummins®

DISCONTINUED

Cummins®
Superseded by 2871878
Genuine OEM Part

This truck part is made by Cummins®. We guarantee that all of our parts are from the OEM (original equipment manufacturer), ensuring a proper fit and quality manufacturing. We make it easy to buy truck parts online.

Manufacturer Warranty*
DESCRIPTION
The Doser Injector, also known as the Diesel Exhaust Fluid (DEF) Injector, is a crucial component of modern diesel engines equipped with Selective Catalytic Reduction (SCR) systems. The part number for this component is 2871878NX. Its primary function is to inject DEF into the exhaust stream downstream of the Diesel Particulate Filter (DPF) to reduce NOx emissions. The injector consists of a solenoid-controlled valve that opens and closes at precise intervals to spray a fine mist of DEF into the exhaust gas. The amount of fluid injected is determined by the engine's Electronic Control Module (ECM), which calculates the correct dosing rate based on various inputs such as engine load and speed, temperature, and NOx sensor readings. Proper maintenance and replacement of this component are essential for optimal performance and compliance with emissions regulations.
RELATED PARTS
New Part Equivalent
2871878
OE Equivalent
0-444-043-031

SPECIFICATIONS

Package Dimensions
6.8 x 3.4 x 3.5 in
Weight
0.85 lbs
* This information is provided as is and may be out of date. Please contact us or the manufacturer to verify warranty coverage.
* Variable geometry turbocharger and electronic actuator repairs are not eligible to be claimed as over-the-counter under New or ReCon parts warranty for parts installed after October 1, 2018.
* Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF), Selective Catalyst Reduction (SCR) catalyst, and Electronic Control Module (ECM) repairs are not eligible to be claimed as over-the-counter under New or ReCon parts warranty for parts installed after January 1, 2020.
* These restrictions are only applicable to New parts and ReCon parts coverages for the components listed above sold to a customer in the US or Canada. All other coverages are excluded. All other regions are excluded.

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