5012171R91 | Genuine International® / Navistar® DEF Sensor, 7 Gallon Tank, QLS 1% SSI

SKU: 5012171R91 MPN: 5012171R91

Stay ahead of emissions issues with the Genuine International / Navistar DEF Header. Condition: new. Part number: 5012171R91. Reliable 7-gallon DEF tank monitoring with QLS 1% SSI precision keeps your engine and SCR system protected.

$799.00
No Core Charge
8 in stock, ready to ship

Pickup available at Warehouse - Howard st 7092 ste F

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: 5012171R91

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    Pickup available. Usually ready in 24 hours

Product Description

Product Name Diesel Exhaust Fluid (DEF) Header Product Name Diesel Exhaust Fluid (DEF) Header
Condition New Condition New
Brand International® / Navistar® Brand International® / Navistar®
Part Number 5012171R91 Part Number 5012171R91
Inetrchange Part Number 4254211C91 Inetrchange Part Number 4254211C91
Specifications
Sensor Type QLS 1% SSI Sensor Type QLS 1% SSI
Tank Capacity 7 Gallon Tank Capacity 7 Gallon
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:

This DEF Header from International / Navistar is a Genuine part with Part number: 5012171R91 and is new. It is designed for 7-gallon DEF tanks and precisely monitors QLS 1% SSI levels, keeping your SCR system informed and helping your heavy-duty truck maintain proper fluid management. Installing this new sensor ensures accurate readings and prevents unnecessary warnings or engine derates. Interchange part number: 4254211C91

Why Replacement is Important:

A faulty DEF header can cause incorrect readings, trigger dashboard warnings, or even limit engine performance. Replacing it promptly protects your emissions system and avoids downtime.

Impact on Vehicle Performance:

Accurate DEF sensing supports efficient SCR operation, stabilizes engine performance, and ensures reliable emissions management during all driving conditions.

Manufacturer Information:

International® combines advanced engineering with robust design to ensure uptime and dependable operation in all conditions.

Navistar® stands for durable engineering, providing trucks and powertrains built to handle demanding fleet applications.

Tags & Category: Diesel Exhaust Fluid Sensor, DEF QLS Sensor, International, Navistar, QLS 1% SSI, DEF Tank Sensor, 7 Gallon DEF Tank, DEF Quality Level Sensor, SCR System Sensor, Emissions Control Component, Heavy Duty Truck DEF Sensor, (DEF) SCR System

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: 5012171R91