Description
Product Overview
Part Name: Nitrogen NOx Oxygen Sensor
Part Numbers: 5WK96674A, 2894939, 2871978, 2894939RX
Vehicle Compatibility: Cummins Diesel Engines (US Models) – Designed for EPA Tier 4 emission-compliant Cummins ISX, ISB, and QSX diesel engines used in heavy-duty trucks, buses, and industrial machinery (2014–2024)
Configuration: OEM-style NOx sensor engineered for accurate nitrogen oxide detection in high-temperature diesel exhaust environments. Offers excellent heat resistance, vibration durability, and long operational life for demanding applications.
Function: Monitors NOx levels in exhaust gases and transmits data to the ECU, enabling real-time DEF dosing and optimized fuel combustion, ensuring U.S. EPA Tier 4 compliance and reduced emissions.
Technical Specifications
Type: Nitrogen Oxide (NOx) Oxygen Sensor
Material: Corrosion-resistant stainless-steel housing with a ceramic sensing core and heat-shielded cable assembly
Application: Fits Cummins Tier 4 diesel engines (2014–2024) using NOx sensor references 5WK96674A / 2894939 / 2871978 / 2894939RX
Cross-Reference: Equivalent to Cummins OE part numbers above; compatible with OEM SCR and DEF emission systems used across U.S. heavy-duty platforms
Installation: Direct-fit replacement; installs easily into OEM exhaust port and connects to factory wiring harness without modification
Service Interval: Replace when SCR or NOx system fault codes (P2201, P229F) appear, or when emission efficiency drops
Delivery & Availability
Stock Options: High-quality aftermarket Cummins NOx sensors available
Delivery Time: 3–7 days internationally
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