Description
Product Overview
Part Name: Nitrogen NOx Oxygen Sensor (Inlet Position)
Part Numbers: 5WK96631H, 12669594, 12671387
Vehicle Compatibility: GM Diesel Vehicles (US Models) – Designed for Duramax-equipped models including Chevrolet Silverado, GMC Sierra HD, and Express/Savana diesel vans with SCR (Selective Catalytic Reduction) systems (2013–2024)
Configuration: OEM-style inlet NOx sensor engineered for accurate nitrogen oxide detection in the pre-SCR exhaust stream. Ensures optimal DEF (Diesel Exhaust Fluid) dosing and stable combustion across a range of engine conditions.
Function: Measures NOx concentration entering the SCR catalyst and communicates real-time data to the ECU, supporting efficient emissions control and compliance with U.S. EPA Tier 4 diesel standards.
Technical Specifications
Type: Nitrogen Oxide (NOx) Oxygen Sensor – Inlet
Material: Stainless steel housing with ceramic sensor element and high-temperature insulated wiring
Application: Fits GM Duramax diesel engines (2013–2024) using NOx sensor references 5WK96631H / 12669594 / 12671387
Cross-Reference: Equivalent to GM OE part numbers above; compatible with OEM SCR and DEF emission systems used in light and heavy-duty Duramax engines
Installation: Direct-fit replacement; mounts upstream in the exhaust system before the SCR catalyst and connects to OEM harness
Service Interval: Replace when check engine light appears, NOx sensor fault codes (P2200–P2203) occur, or emissions performance degrades
Delivery & Availability
Stock Options: High-quality aftermarket GM NOx sensors available
Delivery Time: 3–7 days internationally
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