Cummins NOx Sensor 5WK96765A 4326863 A045S157 Stable output, accurate sensing

If a Cummins engine shows emission fault light on, power loss, abnormal fuel consumption, or the dashboard displays “NOx sensor signal abnormal,” the vehicle’s nitrogen oxide sensor may be aging or failed. When functioning properly, this sensor monitors NOx concentration in exhaust in real time and feeds data to ECU to precisely control urea injection, ensuring emissions compliance and optimal engine performance. OEM numbers: 5WK96765A, 4326863, A045S157; compatible with Cummins ISB, ISL, ISC and other Euro V/VII diesel engines. Ensure sensor connector is clean and dry during installation; torque to 35-45 N·m; after installation, use a diagnostic tool to clear fault codes and complete sensor learning.