Nitrogen Oxide Sensor 4326873 fits Cummins B6.7, F3.9, ISB, ISL9, QSF3.9, QSB6.7, QSX11.9, QSG12, X12, QSX15, and QSN14 engines. It monitors NOx levels in the exhaust for emissions compliance. OEM-grade construction for accurate readings and reliable service.

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