5578983 | Genuine Cummins® Doser Injector for ISB and QSB engines

Description and Purpose:

This Genuine Cummins Doser Injector, new and carrying Part number: 5578983, is built to deliver exact DEF amounts in ISB and QSB engines under EPA21 standards. Its robust 12V operation withstands harsh duty cycles, ensuring continuous emissions control and SCR system accuracy. Designed for high-pressure DEF injection, it maintains optimal dosing even under extreme temperature variations and heavy engine load conditions. Cross reference: 5578983RX, 5578983CUM

Why Replacement is Important:

A worn or malfunctioning injector can trigger false DEF readings or engine derates. Installing a genuine Cummins injector ensures reliable SCR operation, avoids costly repairs, and maintains system integrity.

Impact on Vehicle Performance:

Maintains accurate DEF dosing, supports emission compliance, and prevents unexpected engine power limitations.

Manufacturer Information:

Cummins® stands for engineering excellence, producing high-performance engines designed to meet the toughest operational challenges.

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.