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

SKU: 4377650 MPN: 4377650

Maximize emission efficiency with Genuine Cummins Doser Injector. Condition: new. Part number: 5506855. Fits ISB and QSB engines meeting EPA21 standards. Ensures reliable dosing performance.

$629.00
No Core Charge
3 in stock

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Contact us to check if overnight next-day delivery is available for your order - PN: 4377650

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Product Description

Product Name Doser Injector Product Name Doser Injector
Condition New Condition New
Brand Cummins® Brand Cummins®
Part Number 4377650 Part Number 4377650
Cross Reference 4377650RX Cross Reference 4377650RX
Interchange Part Number CMI2520184C2, 2520184C2 Interchange Part Number CMI2520184C2, 2520184C2
Engine Compatibility
Cummins ISB, QSB Cummins ISB, QSB
Emission Compliance EPA21 Emission Compliance EPA21
Specifications
Voltage 12V Voltage 12V

Useful Information

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.

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  • Icon Truck, Fast Delivery
    Free shipping over $199 Place an order today and receive it on Mar 6
  • Clock Icon
    Orders placed before 7-PM EST will ship same business day
  • Location icon, warehouse pickup point.
    Pickup available usually ready in 24 hours
  • Need it fast? We offer overnight shipping

    Contact us to check if overnight next-day delivery is available for your order - PN: 4377650