4326470 5WK96722B 24V NOx Sensor 51.15408-0017 Universal Diesel Vehicle Parts

4326470 nitrogen-oxygen sensor (OEMs including 4326470, 5WK96722B and 51.15408-0017); universal diesel vehicle component installed near SCR catalyst in exhaust system; monitors exhaust NOx concentration in real time and transmits data to ECU to precisely control urea injection, reducing emissions and optimizing engine performance. Fits multiple commercial vehicles and construction machinery; installation difficulty moderate; labor about 1 hour; avoid damage to wiring or contamination of connectors. If emission warning light is on or power is limited, replacement recommended first.