5012174R91 | Genuine International® DEF Tank Level Sensor 15.5G/16G/23G QLS SSI

Description and Purpose:

This OEM Diesel Exhaust Fluid Level Sensor with QLS/SSI signal output. Part Number: 5012174R91. Brand: International / Navistar. Condition: New. Designed for 15.5, 16, and 23-gallon DEF tanks, this sensor is responsible for monitoring fluid levels in SCR aftertreatment systems. It delivers real-time fluid data to the vehicle’s control module, ensuring accurate DEF dosing and emissions compliance. Built for commercial diesel trucks, it withstands the demands of high-temperature, high-vibration environments while helping maintain long-term system reliability.

Why Replacement is Important:

Failure to replace a malfunctioning DEF sensor can cause engine derate, system warnings, and poor emissions performance. A new sensor restores accurate monitoring and ensures proper SCR operation.

Impact on Vehicle Performance:

With reliable fluid level data, the engine maintains its full power range and avoids disruptions linked to DEF system failures or dosing inaccuracies.

Manufacturer Information:

International® emphasizes serviceability and component accessibility to minimize downtime in demanding operations.

Navistar® supports customers with flexible vehicle configurations tailored to specific industry requirements.

Tags & Category: DEF Sensor, DEF Level Sensor, DEF Tank Sensor, DEF System Parts, SCR System Components, Diesel Exhaust Fluid Sensor, QLS Sensor, SSI Sensor, Diesel Emissions Parts, Aftertreatment System, Emissions Control, Truck DEF Sensor, Universal DEF Sensor

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.