5508583NX Genuine Cummins DEF Doser Injector

Product Overview

The 5508583NX is a genuine Cummins DEF doser injector designed for compatible diesel exhaust fluid system applications including B6.7, L9, X12, and X15 engine platforms. It delivers controlled diesel exhaust fluid into the aftertreatment system to support SCR operation and maintain proper DEF injection during emissions system processes.

Product Features

The 5508583NX DEF doser injector is manufactured to Cummins specifications for diesel exhaust fluid injection system operation.

• Injects DEF into the exhaust aftertreatment system during dosing events.
• Regulates diesel exhaust fluid delivery for SCR system operation.
• Supports DEF injection requirements across compatible Cummins engine platforms.
• Connects with factory emissions system components and mounting interfaces.
• Maintains controlled fluid distribution throughout aftertreatment operation cycles.
• Assists proper emissions system function through accurate DEF dosing.

General Specifications

Installation Notes

The 5508583NX should be installed after inspecting the DEF injector mounting surface, electrical connector, DEF supply connection, and exhaust dosing point for contamination, leaks, or physical damage that could affect injection accuracy. After installation, verify secure electrical connection, confirm proper DEF flow, and perform the required aftertreatment system checks using compatible diagnostic equipment.

Always verify the part number, engine model, DEF system configuration, and aftertreatment application before installation.