DEF Doser / Diesel Exhaust Fluid Dosing Module
Cummins Part Number: 2888173
Bosch Part Number: 0444043135
This is a genuine brand-new Bosch OEM DEF Doser designed for Cummins aftertreatment systems. It precisely meters Diesel Exhaust Fluid (DEF/AdBlue) into the exhaust system to support proper Selective Catalytic Reduction (SCR) operation and efficient NOx emission control.
Engineered to meet OEM standards for fit, form, and function, this dosing injector provides reliable DEF delivery and is an excellent replacement for a worn, clogged, or malfunctioning DEF doser.
Key Features
✅ Genuine Bosch OEM Component
✅ Direct Replacement for Cummins 2888173
✅ Precise DEF dosing and atomization
✅ Supports proper SCR aftertreatment operation
✅ Helps maintain effective NOx emission control
✅ Helps restore proper exhaust aftertreatment performance
✅ Designed for reliable OEM-style fitment
✅ Durable, corrosion-resistant construction
✅ Easy installation with direct-fit design
Common Symptoms of a Failed DEF Doser
A defective or restricted DEF doser may contribute to:
- Check engine or aftertreatment warning lights
- DEF/SCR system fault codes
- Poor DEF delivery or spray pattern
- NOx emissions system faults
- Reduced engine performance
- Derate or other aftertreatment-related issues
Replacing a faulty DEF doser can help restore proper DEF delivery and aftertreatment system operation.
Applications / Fitment
Commonly used on Cummins-powered heavy-duty vehicles, including select applications from:
Important: Fitment can vary by engine model, year, emissions configuration, and VIN. Please verify the part number and connector/configuration of your original unit before ordering.
OEM / Cross-Reference Part Numbers
This DEF doser is associated with the following part numbers and references:
- 0444043034
- 0 444 043 034
- 2888173
- 2888173NX – ReCon
- 2888173RX – Ordering Information
Please verify your original part number before purchasing. Part numbers may be used across different applications and configurations, so vehicle make and model alone are not sufficient to guarantee compatibility.
Compare:
✔ Part Number
✔ Connector
✔ Mounting/Physical Configuration
✔ Original Part Photos
✔ Engine & Aftertreatment Application
Package Includes1 × Genuine Bosch OEM DEF Doser Module
Condition: Brand New
Why Buy Genuine Bosch OEM?Genuine Bosch components are engineered for dependable performance within the vehicle's emissions and aftertreatment system. This DEF doser is designed to provide accurate DEF delivery while maintaining the proper fit and function expected from an OEM-quality component.
