Cummins 12V NOx Sensor 4326871 5WK96764B Precise match, original vehicle specifications

If your Cummins 12V diesel engine shows power loss, noticeably higher fuel consumption, or the “Check Engine” light with NOx emission fault codes, the OEM NOx sensor may be aging or failed. When functioning properly, this sensor monitors NOx concentration in exhaust in real time and feeds signals to the ECU to ensure precise urea injection and compliant emissions, while maintaining optimal combustion efficiency. OEM number 4326871, compatible with Cummins 12V system models, compatible with 5WK96764B/5WK96764B specifications. Installation should be performed after the engine has cooled; avoid hot engine disassembly to prevent thread damage. Also, route the sensor harness away from high-temperature exhaust pipes or moving parts to ensure signal stability.