康明斯24V卡车氮氧传感器 4984577 5WK96720B OBD尾气修复

Cummins 24V truck NOx sensor (OEM: 4984577, 5WK96720B) directly replaces the factory number and fits most Cummins diesel engines. Core function is real-time monitoring of nitrogen oxide concentration in exhaust and transmitting data to the ECU to ensure SCR urea injection accuracy. After installation, it effectively resolves excessive exhaust, torque-limiter issues, and helps pass OBD tests. If the truck exhibits higher fuel consumption, abnormal urea usage, or check engine light, the sensor is aging and should be replaced promptly.