Free help & advice Learn more
International  |  SKU: 4097723C91

4097723C91 | Genuine International 9.5 Gal Def Tank Qls Sensor Head, 25 INCH

$54900
Shipping calculated at checkout.

Need a quote?

Contact us — we’ll send you a quick and accurate offer!

  • help@forcetruckparts.com
  • +1 (828) 233-5509

Return Within 30 Days
  • The item can be returned within 30 days from the date of receipt.
  • Not satisfied? Contact us by email or phone for return instructions or exchange

Shipping Terms
  • Enjoy free shipping on orders over $100.
  • Orders placed before 6:30 PM (EST) are shipped the same day.

365 Days Warranty!

Buy safely, Returns within 30 days.

Description:
A DEF (Diesel Exhaust Fluid) Sensor Head Assembly 4097723C91 is a critical emissions control component in modern diesel engines equipped with Selective Catalytic Reduction (SCR) systems. It monitors and manages various aspects of the DEF tank and fluid, ensuring that the vehicle meets emissions regulations by properly injecting DEF into the exhaust stream. New 9.5 Gal Def Tank Qls Sensor Head, 25 INCH For heavy-duty trucks using the 9.5-gallon DEF tank.

Part Number: 4097723C91
Condition: New
Manufacture/Brand: International / Navistar

Specifications For 4097723C91:

Specification Details
Part type DEF Tank Head Unit / DEF Tank Level Sending Unit
Function Measures DEF (Diesel Exhaust Fluid) level in the tank
Tank capacity 9.5 gallons
Sensor type FLS — float-level sensor
DEF system SSI
Federal emissions year 2013–2015
Manufacturer International / Navistar
Application Heavy-duty commercial vehicles
Mounting Tank-mounted head/sending unit



Fits 4097723C91 For International/Navistar heavy-duty trucks using the 9.5-gallon DEF tank, including applications such as:

 
  • International ProStar
  • International TranStar
  • International WorkStar
  • International DuraStar
  • Other International/Navistar models equipped with the 9.5-gallon DEF tank and 2013–2015 emissions configuration.



Purpose of using 4097723C91:

Function Purpose
Level Sensor Detects how much DEF is in the tank
Quality Sensor Measures DEF concentration (should be 32.5% urea / 67.5% deionized water)
Temperature Sensor Monitors DEF temperature to prevent freezing or overheating
Heater Warms DEF in cold weather so it can flow to the injector
Filter Prevents debris from entering the DEF injection system
Electronic Interface Communicates with the Engine Control Module (ECM) via CAN bus


Signs of a Bad DEF Sensor Head 4097723C91:

  • DEF level or quality fault codes

  • "Incorrect DEF Quality" warning

  • DEF tank shows full/empty incorrectly

  • Engine derates or restricts speed

  • Emissions system warnings


About the Manufacturer – International / Navistar:
International, a brand of Navistar International Corporation, is a leading American manufacturer of commercial trucks, buses, and diesel engines. With a history dating back to the early 1900s, International is known for producing durable and reliable vehicles used in freight, construction, and municipal operations.

Navistar has built a strong reputation in the trucking industry by focusing on innovation, performance, and long-term dependability. Their vehicles and components are trusted by fleets and drivers across North America and beyond.

Bosch Parts

View all

  • Visit our support center

    Expert help & advice

  • Check your order status

    Updates & tracking

  • Returns & exchanges

    All you need to know

  • Price-match guarantee

    Our promise to you