4397723C91 | Genuine International® 9.5 Gallon Def Tank Qls Sensor Head

Description and Purpose:

This New, Genuine International 9.5 Gallon DEF Tank QLS Sensor Head, Part Number: 4397723C91, designed for commercial vehicle emission systems. It delivers accurate diesel exhaust fluid level monitoring in heavy-duty environments and fits various Severe Service and Linehaul models. As a critical part of the DEF tank assembly, it ensures reliable data transmission to maintain proper emission control functions under high-demand operations.

Why Replacement is Important:

A degraded DEF sensor can result in incorrect fluid readings, which may trigger engine derates or emissions faults. Replacing it promptly helps protect your truck from unexpected downtime and ensures compliance with emission regulations.

Impact on Vehicle Performance:

With precise DEF level tracking, the vehicle maintains correct dosing for the SCR system, directly supporting fuel efficiency and engine stability in daily operation.

Manufacturer Information:

International® is dedicated to producing versatile trucks that perform equally well in long-haul, regional, and vocational environments.

Navistar® supports fleet operators through innovative engineering that improves vehicle uptime and reduces operational costs.

Tags & Category: DEF Sensor Units, DEF Tank Components, Heavy-Duty Truck Part, Commercial Vehicle Emission Control, International DEF Sensor, Severe Service Truck Component, QLS 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.