Genuine Cummins 5511564 DEF Header Sensor | SCR Aftertreatment

Genuine Cummins 5511564 DEF Header Sensor | SCR Aftertreatment

The Genuine Cummins 5511564 is a DEF (Diesel Exhaust Fluid) header sensor unit for Cummins SCR (Selective Catalytic Reduction) aftertreatment systems. It monitors DEF quality and level, providing data to the ECM to ensure proper urea injection for NOx reduction. This part fits Class 8 heavy-duty trucks equipped with Cummins SCR aftertreatment. Stocked in Kelowna, BC and ships Canada-wide.

Specifications

• Part Number: 5511564
• Type: DEF Header / Sensor Unit (SCR Aftertreatment)
• Cross-references: 4378049, 4378049NX, 4378049RX, DEF-100027-CMN
• International/Navistar cross-reference: 2515990C1, 2515990C2, 4353000C91, 4353000C92
• Application: Class 8 heavy-duty trucks with Cummins SCR aftertreatment

Fitment

Fits Class 8 heavy-duty trucks equipped with Cummins SCR aftertreatment systems, including International-branded vehicles.

Cross-References

• Cummins: 4378049, 4378049NX, 4378049RX
• Navistar/International: 2515990C1, 2515990C2, 4353000C91, 4353000C92
• Other: DEF-100027-CMN, 601965, 602062

FAQ

What does the DEF header sensor do?

The DEF header sensor monitors the quality and temperature of the diesel exhaust fluid in the tank. This data allows the ECM to verify proper DEF concentration (32.5% urea) and flag contamination, preventing SCR system damage.

What fault codes does a failed DEF header sensor trigger?

Typical faults include DEF quality codes (SPN 3031, 5246, 3361 depending on platform) in Cummins INSITE. Check engine lights and SCR derates are common symptoms.

Does this replace the International/Navistar version?

Yes — the 5511564 cross-references to the Navistar/International 2515990C1 and 4353000C91 applications. Verify fitment by engine serial number.

Do you ship to my location?

Yes. AIM Rentals ships Canada-wide from Kelowna, BC.