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4326872 Genuine Cummins Nox Nitrogen Oxide Exhaust Sensor
4326872 Genuine Cummins Nox Nitrogen Oxide Exhaust Sensor
4326872 Genuine Cummins Nox Nitrogen Oxide Exhaust Sensor

4326872 Genuine Cummins Nox Nitrogen Oxide Exhaust Sensor

P/N: 4326872 Manufactured by: Cummins
$368.00 - $368.00
$368.00
$368.00 - $368.00
$368.00
1 in Stock
Condition: New
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At Line Truck Parts LLC, we are committed to providing reliable automotive parts and a transparent customer experience. Eligible parts purchased directly from our website are covered by a 2-Year Limited Warranty, giving you added confidence in your purchase. Learn More

Product Overview

The 4326872 is a genuine Cummins Nox Nitrogen Oxide Sensor designed for select Peterbilt and Ottawa truck applications with Cummins ISX12 and ISX15 engines. This sensor operates in the exhaust emissions control system by measuring nitrogen oxide levels and sending data to the ECM for SCR, DEF, and EGR system operation. 

Product Features

The 4326872 Nox Nitrogen Oxide Sensor is manufactured to Cummins factory specifications for exhaust emissions measurement and after-treatment system input.

  • Reads exhaust NOx content so the ECM can monitor emissions system activity.
  • Provides the signal input used to coordinate SCR operation.
  • Helps the DEF dosing strategy respond to measured exhaust conditions.
  • Supplies emissions feedback used during EGR and after-treatment control.
  • Supports diagnostic monitoring for NOx sensor and SCR efficiency faults.

Technical Specifications

Condition New
Part Number 4326872
Brand Cummins
Part Type Nox Nitrogen Oxide Sensor


Installation Notes

The 4326872 should be installed in the correct exhaust sensor location with the connector fully seated and the harness checked for heat damage, corrosion, or loose terminals. Confirm ECM communication after installation and clear any active NOx, SCR, or DEF-related diagnostic codes before returning the truck to service.

Verify part number, VIN, engine configuration, production date, emissions package, and applicable factory options before installation.