4326870

Description

Overview

4326870 is a NOx Sensor used in the emission control and diagnostic system. It is designed for CUMMINS engines and supports measurement of nitrogen oxides for emission control and onboard diagnostics in heavy duty service. Cummins produces heavy duty diesel engines widely used in class 8 highway tractors and vocational trucks.

What this part does

This NOx sensor measures nitrogen oxides in the exhaust stream and sends feedback to the engine and aftertreatment control system. Accurate NOx measurement is required for proper DEF dosing control and on board diagnostics.

Where this part fits

This part is generally used on CUMMINS engine platforms installed in class 8 trucks and heavy equipment. Exact fitment depends on the specific engine family, emission level, and chassis configuration.

OEM and cross references

This part may replace or cross reference the following numbers:

• 2020

Installation and replacement notes

• Confirm compatibility with the engine family and emission certification level before ordering.
• Inspect related components for damage or contamination that may have contributed to the original failure.
• Follow OEM torque specifications and service procedures during installation.
• When replacing a NOx sensor route and secure the harness away from heat and abrasion points and perform any required reset or relearn procedures with a scan tool.

Specifications

• Part type: NOx Sensor
• OEM or application group: CUMMINS
• Additional cross references are listed in the section above.

Related components

During service you may also need clamps, gaskets, sensors, mounting hardware, or additional aftertreatment components depending on the specific installation.