Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.

PAI Industries · Probes & Sensors
050771
In stock · ships from Knoxville
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.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
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.
Part Number: 050771
INLET NOX SENSOR CUMMINS 3687930 4326870RX
Vendor: PAI Industries
Dealer: Knox Trailers
Compatibility, alternatives, and more