The Volvo genuine NOx sensor, part number 23494659, is a critical component for accurately monitoring nitrogen oxide levels within the exhaust system. This sensor plays an integral role in the Selective Catalytic Reduction (SCR) system, ensuring vehicles comply with stringent Tier 5 emission standards. It provides precise data to the engine control unit for optimal exhaust gas treatment, contributing to environmental protection and efficient engine operation. This sensor is designed for various Volvo truck and bus models, including the FH, FM, FMX, B5LH, B8R, B11R, and B13R series.