Overview

The MCT CM4944 is an aftermarket nitrogen oxides (NOx) sensor cataloged in the Exhaust / NOx Sensors category and identified against reference number 2894944. It is clearly branded and part-numbered as CM4944 and is positioned as a replacement option wherever a 2894944-style sensor is specified. The listing emphasizes identification and availability, providing a practical, part-numbered alternative for service work that calls for this reference. Because no electrical, connector, or dimensional specifications are included, maintenance teams should confirm the reference number against the removed component and applicable service literature prior to installation.

Function in Aftertreatment

NOx sensors supply real-time exhaust nitrogen oxides data to the engine control unit, allowing the aftertreatment system to manage selective catalytic reduction (SCR) dosing and support emissions diagnostics. Replacing a failed or drifting sensor with the CM4944 helps restore accurate feedback, which is essential for consistent emissions control, optimized system operation, and avoiding emissions-related faults that can lead to unplanned downtime.

Identification and Cross-Reference

The CM4944 is cross-referenced directly to 2894944 and is presented as a stocked replacement option in that reference family. It is commonly listed alongside interchange numbers such as Automann 577.90650, Dinex 5EL007, Dorman 904-6004, and other references including 0435023 and 2872236. Use these identifiers to verify a like-for-like swap with your existing sensor, ensuring compatibility with the target exhaust aftertreatment system before purchase.