4086806C91 | Genuine International® / Navistar® 12-Gal DEF Quality & Level Sensor Head Unit (QLS Module Assembly)

SKU: 4086806C91 MPN: 4086806C91

Keep your DEF system accurate with the 12-Gal DEF Sensor Head Unit, from Genuine International/Navistar, with Part Number: 4086806C91, offered in new condition, and perfect for keeping your DEF system in check.

$649.00
No Core Charge
2 in stock

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Contact us to check if overnight next-day delivery is available for your order - PN: 4086806C91

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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 4086806C91 Part Number 4086806C91
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:

Genuine International/Navistar provide this new DEF Sensor Head Unit (QLS Module Assembly), Part number: 4086806C91, designed for heavy-duty trucks. It accurately measures diesel exhaust fluid levels in N9, N10, N13, and DT engines (2011–2016) and works with a 12-gallon DEF tank, supporting stable emissions dosing and proper operation of commercial vehicle exhaust systems.

Why Replacement is Important:

A failing DEF sensor can cause false alerts or incorrect fluid readings. Installing a new unit maintains accurate DEF levels and keeps emissions systems functioning correctly.

Impact on Vehicle Performance:

Precise DEF monitoring ensures steady engine and exhaust system operation, reducing interruptions and supporting reliable truck use.

Manufacturer Information:

International® builds durable commercial trucks for demanding environments. 

Navistar® produces engines and components known for long-lasting reliability and dependable performance across medium- and heavy-duty fleets.

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: 4086806C91