5012173R91 | Genuine International® / Navistar® 12-Gal DEF Quality & Level Sensor Head Unit

SKU: 5012173R91 MPN: 5012173R91

Elevate DEF accuracy using the New Genuine International / Navistar Sensor Head Unit. Part number: 5012173R91. Tracks fluid quality and level with canbus precision, 6-bolt mounting, and fully integrated suction and return fittings.

$649.00
No Core Charge
2 in stock

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Product Description

Product Name DEF Quality & Level Sensor Head Unit Product Name DEF Quality & Level Sensor Head Unit
Condition New Condition New
Brand International® / Navistar® Brand International® / Navistar®
Part Number 5012173R91 Part Number 5012173R91
Engine Compatibility
International / Navistar N9, N10, N13, DT (2011-2016) International / Navistar N9, N10, N13, DT (2011-2016)
Tank Capacity Compatibility
Tank 12 Gallon Tank 12 Gallon
Specifications
Electrical Connector Deutsch DT4 (STD) Electrical Connector Deutsch DT4 (STD)
Sensor Type Digital (canbus) Sensor Type Digital (canbus)
DEF Header Height (IN) 18 DEF Header Height (IN) 18
DEF Suction Fitting Dia. (IN) 3/8 SAE J2044 DEF Suction Fitting Dia. (IN) 3/8 SAE J2044
DEF Return Fitting Dia. (IN) 5/16 SAE J2044 DEF Return Fitting Dia. (IN) 5/16 SAE J2044
Coolant Inlet Fitting Dia. (IN) 5/8 Hose Bead Coolant Inlet Fitting Dia. (IN) 5/8 Hose Bead
Coolant Outlet Fitting Dia. (IN) 5/8 Hose Bead Coolant Outlet Fitting Dia. (IN) 5/8 Hose Bead
In-Tank Filter 40µ In-Tank Filter 40µ
Tank Interface 6 Bolt Tank Interface 6 Bolt

Useful Information

Description and Purpose:

Part number: 5012173R91 is a new Genuine International / Navistar DEF Quality & Level Sensor Head designed to eliminate false purity and empty-tank alerts in 12-gallon DEF systems. A digital canbus output, Deutsch DT4 connector, 40µ in-tank filter, and heated 5/8 ports stabilize fluid conditions while 3/8 suction and 5/16 return maintain consistent feed to the pump through a 6-bolt interface.

Why Replacement is Important:

If the sensor corrupts purity or level data, the ECM forces derates even when the tank is full, crippling the truck without mechanical issues.

Impact on Vehicle Performance:

Restores normal torque and dosing logic by ensuring only verified DEF data reaches the SCR controller.

Manufacturer Information:

International® produces parts engineered to maintain steady performance, durability, and operational efficiency for medium- and heavy-duty trucks.

Navistar® manufactures components focused on endurance, optimized engine behavior, and consistent service life for commercial vehicles.

Tags & Category: 12-Gal DEF Quality & Level Sensor, DEF QLS Module Assembly, DEF Sensor Head Unit, Diesel Exhaust Fluid Level and Quality Sensor, SCR System DEF Sensor, DEF Tank Sensor Module, Diesel Emission Control Sensor, Heavy Duty Truck DEF Sensor, DEF Monitoring Module, QLS Sensor Assembly

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.

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  • Icon Truck, Fast Delivery
    Free shipping over $199 Place an order today and receive it on Mar 6
  • Clock Icon
    Orders placed before 7-PM EST will ship same business day
  • Location icon, warehouse pickup point.
    Pickup available usually ready in 24 hours
  • Need it fast? We offer overnight shipping

    Contact us to check if overnight next-day delivery is available for your order - PN: 5012173R91