A050S599 | Genuine Cummins® Doser Injector for ISB and QSB engines

Description and Purpose:

This New Genuine Cummins Doser Injector, designated as Part number: A050S599 and is specifically engineered for ISB and QSB engines meeting EPA21 standards. Operating at 12 volts, it precisely meters Diesel Exhaust Fluid (DEF) into the SCR aftertreatment system, ensuring consistent emissions control. Built for heavy-duty performance, this injector delivers reliable DEF dosing under demanding conditions, supporting engine efficiency and environmental compliance.

Why Replacement is Important:

A malfunctioning DEF injector can cause irregular dosing, trigger emission warnings, or even lead to engine derates. Replacing it with a genuine Cummins unit ensures the SCR system works correctly and prevents costly downtime.

Impact on Vehicle Performance:

Proper DEF injection preserves emission control efficiency, avoids engine derates, and supports consistent performance of ISB and QSB-equipped vehicles.

Manufacturer Information:

Cummins® is trusted for engines that provide strength, fuel efficiency, and long service life across commercial and industrial sectors.

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.