2888173 | Genuine OEM Cummins DEF Doser Injector

2888173 Genuine OEM Cummins DEF Doser Injector is a component designed for use in a compatible diesel engine aftertreatment system. It delivers diesel exhaust fluid (DEF) into the exhaust aftertreatment system to support emissions control. The exact application should be verified using the original part number and engine specifications.

PRODUCT INFORMATION

Part Number: 2888173
Brand: Cummins
Condition: Genuine OEM
Component: DEF Doser Injector
Fuel Type: Diesel
Engine Applications: Not specified
Other important specifications: Diesel exhaust fluid dosing component

APPLICATIONS

The 2888173 Cummins DEF Doser Injector is intended for compatible Cummins diesel engine aftertreatment systems that require this specific component. Exact applications may vary depending on the engine model, emissions system, vehicle configuration, and production specifications. Verify compatibility using the original part number and vehicle information before purchasing.

FUNCTION

The DEF Doser Injector delivers diesel exhaust fluid into the exhaust aftertreatment system as part of the emissions reduction process. Proper fluid dosing supports the operation of the selective catalytic reduction (SCR) system, where equipped, helping reduce nitrogen oxide (NOx) emissions. Correct operation depends on compatibility with the specific engine and aftertreatment configuration.

A worn, damaged, or failing DEF Doser Injector may cause symptoms such as:

• Aftertreatment system warning lights
• Diagnostic trouble codes
• Incorrect DEF dosing
• SCR system performance issues
• Increased emissions
• Engine derate or warning messages, depending on the vehicle system

WHY REPLACE A DEF DOSER INJECTOR?

A damaged or malfunctioning DEF Doser Injector can interfere with the delivery of diesel exhaust fluid and affect aftertreatment system performance. Incorrect dosing may trigger emissions-related faults and affect the operation of the SCR system. Replacing a faulty injector with the correct Genuine OEM Cummins DEF Doser Injector can help restore proper fluid delivery and support normal emissions control operation.

FITMENT INFORMATION

Before purchasing, verify the Part Number, VIN, vehicle model, engine, and configuration to confirm the correct application. DEF Doser Injector compatibility may vary by engine family, emissions standard, and aftertreatment system. Do not assume compatibility based only on the appearance of the part.

If you are unsure whether this part is correct for your vehicle, please contact us with your VIN and original part number. We are happy to help verify compatibility before purchase.

GENUINE CUMMINS PART

Part Number: 2888173