Description
Product Overview
Part Name: Nitrogen NOx Oxygen Sensor (Inlet Position)
Part Numbers: 5WK96742A, 4326873, A045S170, A2C89787700-02, SNS142A
Vehicle Compatibility: Cummins Diesel Engines (US Models) – Designed for EPA Tier 4 emission-compliant ISX, ISB, and QSX engines used in heavy-duty trucks, buses, and machinery (2014–2024)
Configuration: OEM-style inlet NOx sensor engineered for precision exhaust gas analysis at the upstream position. Resistant to high exhaust temperatures and vibration, ensuring consistent data transmission to the ECU for SCR system management.
Function: Measures NOx concentration before the SCR catalyst, allowing the engine ECU to optimize DEF injection and achieve maximum fuel efficiency while maintaining strict EPA Tier 4 emission standards.
Technical Specifications
Type: Nitrogen Oxide (NOx) Oxygen Sensor – Inlet
Material: Stainless-steel probe with ceramic sensing element and heat-resistant cable assembly
Application: Fits Cummins Tier 4 diesel engines (2014–2024) using inlet NOx sensor references 5WK96742A / 4326873 / A045S170 / A2C89787700-02 / SNS142A
Cross-Reference: Equivalent to Cummins OE part numbers above; compatible with OEM SCR and DEF emission systems used in U.S. heavy-duty platforms
Installation: Direct-fit replacement; mounts in the upstream exhaust position and connects seamlessly to the factory wiring harness
Service Interval: Replace when NOx-related fault codes (P2201, P229F) appear or when SCR efficiency declines due to inaccurate readings
Delivery & Availability
Stock Options: High-quality aftermarket Cummins inlet NOx sensors available
Delivery Time: 3–7 days internationally
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