4377650 | Genuine Cummins® Doser Injector for ISB and QSB engines

Description and Purpose:

The Cummins Doser Injector, supplied as Part number: 4377650, comes in new condition and is a genuine component built for ISB and QSB engines under EPA21 standards. Operating on a 12V system, it delivers the precise flow of diesel exhaust fluid into the SCR unit, keeping nitrogen oxide levels within compliance. Cross reference: 4377650RX

Why Replacement is Important:

When the injector malfunctions, DEF delivery becomes inconsistent, which can trigger warning lights, emission faults, and even power limitations. Installing the correct Cummins injector ensures dependable DEF dosing and full SCR functionality.

Impact on Vehicle Performance:

Accurate DEF injection not only restores emissions compliance but also protects engine efficiency, prevents derates, and maintains smooth operation of heavy-duty vehicles.

Manufacturer Information:

Cummins® delivers innovative power solutions, combining efficiency and reliability to support industries worldwide.

Tags & Category: Doser Injector, DEF Injector, 12V, Cummins, ISB, QSB, EPA21, Aftertreatment System, SCR System, Diesel Exhaust Fluid, Emissions Control, OEM Cummins Part, DEF Dosing Valve, Heavy Duty Engine, aftertreatment fuel injector.

Warranty:

Parts Finder Q offers a 365-days warranty for all types of parts in any condition. The -warranty applies exclusively to purchases made directly through our website (partsfinderq.com). Please note that purchases made through third-party platforms like eBay or Amazon are not covered by this warranty.