5506855 | Genuine OEM Cummins DEF Doser Injector

The 5506855 Genuine OEM Cummins DEF Doser Injector is a component of the diesel exhaust fluid (DEF) aftertreatment system. It is designed to deliver DEF into the exhaust stream as part of the emissions control process. Verify the part number and application before purchasing to ensure it matches your vehicle's requirements.

PRODUCT INFORMATION

Part Number: 5506855
Brand: Cummins
Condition: Not specified
Component: DEF Doser Injector
Fuel Type: Diesel
Engine Applications: Not specified
Other Specifications: Diesel exhaust fluid (DEF) injection component for the aftertreatment system.

APPLICATIONS

The 5506855 DEF Doser Injector is intended for use in compatible Cummins aftertreatment systems. Specific engine models, vehicle applications, and configurations have not been confirmed. Check the original part number and vehicle specifications before ordering.

FUNCTION

The DEF Doser Injector delivers diesel exhaust fluid into the exhaust stream, where it supports the selective catalytic reduction (SCR) system in reducing nitrogen oxide (NOx) emissions. Proper dosing is important for the aftertreatment system to operate as designed.

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

• DEF dosing or injection problems
• SCR system performance issues
• Check engine light or aftertreatment warning lights
• Increased NOx emissions
• DEF system fault codes
• Emissions system performance warnings

WHY REPLACE A DEF DOSER INJECTOR?

A faulty DEF Doser Injector can interfere with proper DEF delivery and aftertreatment system performance. Replacing a defective injector with the correct compatible part can help restore proper fluid dosing and support the SCR system's intended emissions control function. Additional diagnosis may be necessary to identify related system faults.

FITMENT INFORMATION

Before purchasing the 5506855 DEF Doser Injector, verify the Part Number, VIN, vehicle model, engine, and aftertreatment system configuration. Compatibility may vary by vehicle and engine application. Do not rely on appearance alone when selecting a replacement 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: 5506855