5012171R91 | Genuine International® / Navistar® DEF Sensor, 7 Gallon Tank, QLS 1% SSI

Description and Purpose:

This DEF Sensor from International / Navistar is a Genuine part with Part number: 5012171R91 and is new. It is designed for 7-gallon DEF tanks and precisely monitors QLS 1% SSI levels, keeping your SCR system informed and helping your heavy-duty truck maintain proper fluid management. Installing this new sensor ensures accurate readings and prevents unnecessary warnings or engine derates. Interchange part number: 4254211C91

Why Replacement is Important:

A faulty DEF sensor can cause incorrect readings, trigger dashboard warnings, or even limit engine performance. Replacing it promptly protects your emissions system and avoids downtime.

Impact on Vehicle Performance:

Accurate DEF sensing supports efficient SCR operation, stabilizes engine performance, and ensures reliable emissions management during all driving conditions.

Manufacturer Information:

International® combines advanced engineering with robust design to ensure uptime and dependable operation in all conditions.

Navistar® stands for durable engineering, providing trucks and powertrains built to handle demanding fleet applications.

Tags & Category: Diesel Exhaust Fluid Sensor, DEF QLS Sensor, International, Navistar, QLS 1% SSI, DEF Tank Sensor, 7 Gallon DEF Tank, DEF Quality Level Sensor, SCR System Sensor, Emissions Control Component, Heavy Duty Truck 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.