2512842C2 | Genuine OEM International 7 Gal DEF QLS Sensor

The Genuine OEM International / Navistar 2512842C2 DEF Quality Level Sensor (QLS) is designed for compatible diesel-powered commercial vehicles equipped with a 7-gallon Diesel Exhaust Fluid (DEF) tank. This sensor assembly monitors DEF-related operating conditions and provides information to the vehicle's emissions control system.

The QLS sensor supports proper Selective Catalytic Reduction (SCR) operation by supplying information used to monitor the DEF supply and identify conditions that may affect emissions system performance.

PRODUCT INFORMATION

• Part Number: 2512842C2

• Brand: International / Navistar

• Condition: Not specified

• Component: DEF Tank Quality Level Sensor

• Sensor Type: QLS / SSI DEF Sensor Assembly

• Tank Capacity: 7 Gallons (approximately 26.5 Liters)

• System: Diesel Exhaust Fluid (DEF) / Selective Catalytic Reduction (SCR)

• Application: Compatible Commercial Diesel Vehicles

• Associated Manufacturer: Cummins (verify exact configuration)

• Installation Location: DEF Tank

• Primary Function: DEF Level and Quality Monitoring

• Temperature Monitoring: Verify sensor configuration

• Electrical Connector: Verify against original assembly

• Fuel Type: Diesel

• Engine Applications: SCR-equipped diesel engines; verify by VIN

• Mounting Configuration: 7-Gallon DEF Tank Application

• Additional Specifications: Verify sensor length, connector type, and tank opening dimensions

APPLICATIONS

The International / Navistar 2512842C2 DEF QLS Sensor is intended for compatible commercial diesel vehicles equipped with the appropriate 7-gallon DEF tank and SCR emissions control system.

Potential applications include:

• International / Navistar Commercial Trucks

• Commercial Vehicles with Compatible Cummins Diesel Engines

• Medium-Duty Diesel Trucks

• Vehicles Equipped with 7-Gallon DEF Tanks

• SCR Emissions Systems Requiring a Compatible QLS / SSI Sensor

Important: Tank capacity alone does not guarantee compatibility. The original part number, sensor length, electrical connector, tank mounting arrangement, and emissions system configuration must match.

FUNCTION

The DEF Quality Level Sensor monitors conditions inside the Diesel Exhaust Fluid tank and sends information to the vehicle's electronic control system.

Depending on its configuration, the sensor may provide DEF level, quality, and temperature information. These measurements help the SCR system monitor the availability and condition of DEF used to reduce nitrogen oxide emissions.

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

• DEF level readings becoming inaccurate or unavailable

• DEF quality or concentration warning messages

• Check engine or emissions system warning lights

• SCR-related diagnostic trouble codes

• Incorrect DEF tank status information

• Engine power derate or emissions-related operating restrictions

WHY REPLACE A DEF QUALITY LEVEL SENSOR?

A malfunctioning DEF tank sensor can prevent the vehicle's emissions system from accurately monitoring Diesel Exhaust Fluid conditions.

Replacing a defective sensor with the correct Genuine OEM International 2512842C2 QLS assembly helps restore intended DEF monitoring and communication with the SCR control system.

Proper DEF sensor operation supports emissions system diagnostics and helps reduce the risk of unnecessary warning messages or operating restrictions caused by incorrect sensor information.

FITMENT INFORMATION

The International 2512842C2 DEF QLS Sensor is intended for specific 7-gallon DEF tank configurations.

Before purchasing, verify:

• Original OEM Part Number: 2512842C2

• DEF Tank Capacity: 7 Gallons

• Truck make, model, and model year

• Original QLS / SSI sensor configuration

• DEF tank opening and mounting dimensions

• Sensor insertion length

• Electrical connector and wiring configuration

• Cummins engine and SCR system compatibility, where applicable

• Vehicle Identification Number (VIN)

If you are unsure whether this DEF sensor fits your truck, please contact us with your VIN, truck model, model year, DEF tank capacity, and original part number before ordering.

Installation Note: DEF sensor replacement should follow the vehicle manufacturer's service procedures. Keep the DEF system free from contamination and verify sensor communication and emissions system operation after installation.

GENUINE INTERNATIONAL PART

International / Navistar supplies replacement components for commercial diesel vehicles and emissions control systems.

The Genuine OEM International 2512842C2 DEF QLS Sensor is intended for compatible 7-gallon DEF tank applications, supporting DEF monitoring and proper SCR system operation when correctly matched and installed.