5012175R91 | Genuine International® / Navistar® Diesel Exhaust Fluid (DEF) Header 25" for 10.6—32G

Useful Information

Description and Purpose:

Supplied as a New Genuine DEF Header by International / Navistar and cataloged under Part number: 5012175R91, this component ensures accurate digital reporting inside DEF tanks ranging from 10.6 to 32 gallons. Its digital canbus sensor measures both quality and level, while J2044 suction and return fittings regulate flow. The 40µ in-tank screen filter protects downstream components, and dual 5/8 coolant channels maintain fluid stability to keep readings valid.

Why Replacement is Important:

If communication from the sensor becomes corrupted, the ECM responds as though DEF is contaminated or missing, regardless of its actual state.

Impact on Vehicle Performance:

Reinstating correct data transmission prevents derates driven by sensor faults and maintains dosing accuracy that keeps emissions compliant.

Manufacturer Information:

International® focuses on practical engineering that simplifies maintenance and improves long-term cost efficiency for fleet operators.

Navistar® ensures part longevity through precision manufacturing calibrated for high-mile fleet environments.

Tags & Category: DEF Header, DEF Tank Head, Diesel Exhaust Fluid Header Module, DEF Sensor Head, DEF Quality Sensor, DEF Level Sensor, DEF Header 25 Inch, 3/8 SAE J2044 Suction, 5/16 SAE J2044 Return, 5/8 Hose Bead Coolant Ports, Coolant-Heated DEF Header, Deutsch DT4 Connector, Digital Canbus Sensor, 40 Micron DEF Filter, 6 Bolt Tank Interface, International DEF System, Navistar Emissions Component.

Warranty:

Parts Finder Q offers a 365-days warranty for all types of parts in any condition. The -warranty applies exclusively to purchases made directly through our website (partsfinderq.com). Please note that purchases made through third-party platforms like eBay or Amazon are not covered by this warranty.