Image is for illustration purposes only. Actual part may vary.

050771

INLET NOX SENSOR CUMMINS 3687930 4326870RX

This is a nitrogen oxide (NOx) sensor that mounts in the exhaust system of Cummins diesel engines to measure NOx levels before the SCR catalyst. The engine computer uses this data to control DEF injection and maintain emissions compliance. When the sensor fails, you may see a check engine light, experience reduced engine power (derate), or fail an emissions test—replacement restores proper operation and prevents costly downtime.