Cummins 5293295RX NOx Sensor Nitrogen Oxide Sensor OEM Diesel Engine. The Cummins 5293295RX NOx Sensor is an OEM diesel engine part designed specifically for commercial trucks. This sensor, manufactured in Mexico, detects nitrogen oxide levels in the exhaust to ensure proper emissions control. With the trusted brand of Cummins and its specialized design, this NOx sensor is a reliable and essential component for maintaining the performance and efficiency of diesel engines on the road.