5300987 | Genuine OEM Cummins Aftertreatment Doser Injector Kit

The 5300987 Genuine OEM Cummins Aftertreatment Doser Injector Kit is a replacement component designed for compatible Cummins diesel engine exhaust aftertreatment systems. This kit helps deliver Diesel Exhaust Fluid (DEF) into the exhaust stream to support the Selective Catalytic Reduction (SCR) process and proper emissions control system operation. Verify compatibility before purchase.

PRODUCT INFORMATION

Part Number: 5300987
Brand: Cummins
Condition: Genuine OEM
Component: Aftertreatment Doser Injector Kit
Fuel Type: Diesel
Engine Applications: Compatible Cummins diesel engine configurations (exact applications to be verified)
Other Specifications: DEF dosing system component for compatible exhaust aftertreatment systems equipped with SCR technology.

APPLICATIONS

The 5300987 Cummins Aftertreatment Doser Injector Kit is designed for compatible Cummins diesel engines equipped with a DEF-based exhaust aftertreatment system. Exact applications depend on engine model, engine serial number, vehicle or equipment type, and emissions system configuration. Confirm that Part Number 5300987 matches the original component before ordering.

FUNCTION

The 5300987 Aftertreatment Doser Injector Kit supports the controlled delivery of Diesel Exhaust Fluid into the exhaust stream. DEF is used by the SCR system to help reduce nitrogen oxide (NOx) emissions. Proper dosing supports the intended operation of the emissions control system and helps maintain compliance with applicable emissions requirements.

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

• Check Engine or emissions system warning lights.

• DEF dosing system fault codes.

• SCR system performance issues.

• Increased nitrogen oxide (NOx) emissions.

• Reduced engine power or engine derate, depending on the fault and engine calibration.

• Emissions system warnings or a failed emissions test.

WHY REPLACE AN AFTERTREATMENT DOSER INJECTOR KIT?

A defective doser injector may interfere with proper DEF delivery and affect SCR system performance. Replacing a faulty component with the compatible 5300987 Genuine OEM Cummins Aftertreatment Doser Injector Kit can help restore correct DEF dosing and support the intended operation of the exhaust aftertreatment system. Before replacing Part Number 5300987, diagnose the system to rule out other possible causes, including contaminated DEF, clogged lines, wiring problems, or faulty sensors.

FITMENT INFORMATION

Before purchasing Part Number 5300987, verify the original part number, VIN (where applicable), engine model, engine serial number, and exhaust aftertreatment system configuration. Fitment may vary depending on vehicle or equipment application, engine rating, and emissions specification. Compare the existing component with the 5300987 Genuine OEM Cummins Aftertreatment Doser Injector Kit to help ensure compatibility.

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: 5300987