4097728C91 | Genuine OEM International/Navistar DEF QLS Sensor

The 4097728C91 DEF QLS Sensor is a genuine International/Navistar component designed for compatible Diesel Exhaust Fluid (DEF) tank systems. It monitors DEF tank conditions and provides sensor information to the vehicle's emissions and aftertreatment control system.

PRODUCT INFORMATION

Part Number: 4097728C91
Brand: International/Navistar
Condition: New
Component: DEF QLS Sensor
Fuel Type: Diesel
DEF Tank Applications: 10.6, 15.9, and 25.2 gallon tanks
System: Diesel Exhaust Fluid (DEF) / SCR
Sensor Technology: QLS (Quality Level Sensor)

APPLICATIONS

Designed for selected International/Navistar truck applications using compatible 10.6, 15.9, or 25.2 gallon DEF tanks. Exact fitment varies by truck model, year, DEF tank configuration, electrical system, and emissions system specifications.

FUNCTION

The DEF QLS sensor provides information related to DEF tank conditions, supporting the vehicle's DEF and SCR aftertreatment system monitoring and control.

A worn, damaged, or failing DEF QLS SENSOR may cause symptoms such as:

• Incorrect DEF level readings
• DEF quality warnings
• DEF system fault messages
• SCR or aftertreatment fault codes
• Check engine or emissions warning lights
• Incorrect sensor readings

WHY REPLACE A DEF QLS SENSOR?

A malfunctioning DEF sensor can provide inaccurate information to the vehicle's emissions control system and may trigger DEF or SCR-related warnings. Replacing it with the correct genuine International/Navistar component can help restore proper DEF system monitoring.

FITMENT INFORMATION

Please verify Part Number 4097728C91, VIN, truck model, year, DEF tank capacity, QLS configuration, and original equipment specifications before ordering.

If you are unsure whether this part is correct for your vehicle, please contact us with your VIN and original part number. We are happy to help verify compatibility before purchase.

GENUINE INTERNATIONAL/NAVISTAR PART

Part Number: 4097728C91