DINEX NOx Sensor for Cummins EPA10 Engines Nitrogen Oxide Sensor Pre/Post SCR 31.22" Length is a direct-replacement NOx sensing module engineered to restore accurate nitrogen-oxide feedback in EPA10 aftertreatment systems. Designed for use on Cummins-equipped heavy-duty trucks, the sensor supplies the engine control module with precise NOx concentration data necessary for the SCR system to calculate and deliver the correct Diesel Exhaust Fluid (DEF) dosing. When a NOx sensor is degraded, SCR dosing can become excessive or insufficient, producing fault codes, DEF overuse, reduced fuel economy, and in some cases vehicle derates or out-of-service conditions. Replacing a failed or out-of-spec sensor with this DINEX unit returns the feedback loop to specification so the ECM can stabilize dosing and emissions control. The sensor is manufactured and tested to meet aftermarket OE-fit requirements and is validated through factory testing and third-party accreditation to ensure repeatable response characteristics under normal operating conditions. Installation is straightforward and intended to be plug-and-play with existing Cummins EPA10 exhaust harnesses; after replacement, standard registration/utility steps with diagnostic tools may be required to clear codes and confirm sensor operation. For fleet operations, the principal measurable benefits include restored SCR control that reduces unnecessary DEF consumption, elimination of intermittent NOx-related fault codes that cause unscheduled downtime, and reestablishment of emissions monitoring needed to maintain compliance. The product specification set and test validation support predictable sensor performance, which simplifies parts stocking and replacement planning for technicians maintaining Cummins EPA10 powertrains across regional and long-haul applications.