4099717C91 | Genuine International® / Navistar® Diesel Exhaust Fluid (DEF) QLS Header for 15.5–23G

SKU: 4099717C91 MPN: 4099717C91

Keep your DEF system running reliably with the Genuine Diesel Exhaust Fluid (DEF) QLS Header from International/Navistar, Part number: 4099717C91, in new condition, designed for tanks with 15.5–23 gallon capacity.

$479.00
No Core Charge
3 in stock

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Contact us to check if overnight next-day delivery is available for your order - PN: 4099717C91

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Product Description

Product Name Diesel Exhaust Fluid (DEF) QLS Header Product Name Diesel Exhaust Fluid (DEF) QLS Header
Condition New Condition New
Brand International® / Navistar® Brand International® / Navistar®
Part Number 4099717C91 Part Number 4099717C91
Specifications
Tank capacity 15.5–23 Gallons Tank capacity 15.5–23 Gallons

Useful Information

Description and Purpose:

The new Diesel Exhaust Fluid (DEF) QLS Header from Genuine International / Navistar, Part number: 4099717C91, is designed to efficiently manage DEF flow in tanks ranging from 15.5–23 gallons. It ensures accurate sensor integration for proper DEF distribution and supports reliable emissions system operation in heavy-duty commercial trucks.

Why Replacement is Important:

Replacing a worn or damaged QLS header prevents incorrect DEF readings, maintaining consistent fluid flow and avoiding system warnings or interruptions.

Impact on Vehicle Performance:

A properly functioning header ensures accurate DEF dosing, helping engines maintain correct emissions control and uninterrupted truck operation.

Manufacturer Information:

International® manufactures commercial trucks and components engineered for durability and performance in demanding applications. 

Navistar® provides engines and supporting parts designed for reliability, consistent DEF management, and long-term operation in heavy-duty fleets.

Tags & Category: DEF QLS Header, Diesel Exhaust Fluid Header, DEF Tank Header, QLS Sensor Header, SCR System Header, DEF Distribution Header, Diesel Emission Fluid Header

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: 4099717C91