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Don't compromise your engine's emissions compliance with "will-fit" aftermarket parts. The Genuine Cummins 2871878 Doser Injector is the factory-correct solution for EPA13 6.7L ISB and QSB engines. This high-precision dosing valve is responsible for injecting Diesel Exhaust Fluid (DEF) into the exhaust stream, where it reacts with NOx to keep your vehicle within legal emission limits.
Being a Brand New (Non-Reman) unit, the 2871878 offers the highest level of service life and reliability, free from the wear and tear of previous use. It is essential for preventing the common "DEF Dosing Fault" codes that lead to costly engine derates and downtime.
Factory-Calibrated Flow: Delivers the exact volume of DEF required by the ECU, preventing "Urea Crystals" caused by over-dosing.
EPA13 & Tier 4 Final Ready: Specifically designed for the thermal and chemical demands of 2013+ emission architectures.
OEM Durability: Manufactured with high-grade stainless steel components to resist the corrosive nature of AdBlue/DEF.
No Core Charge: As a brand-new part, there is no need to deal with core returns or deposits.
| Feature | Specification |
| Part Number | 2871878 |
| Alternative Part No. | 2871878NX (Reman Version) |
| Engine Compatibility | Cummins ISB 6.7 / QSB 6.7 |
| Emission Standard | EPA13 / Tier 4 Final |
| Component Type | DEF / Urea Dosing Valve |
| Condition | Brand New Genuine Cummins |
Medium Duty Trucks: Freightliner M2, Kenworth T270/T370, Peterbilt 337/348.
School Buses: Blue Bird and Thomas Built buses equipped with ISB 6.7 engines.
Off-Highway/Industrial: Excavators, Generators, and Agricultural equipment using the QSB 6.7 Tier 4 platform.
