The Cummins 3687930RX is a genuine OEM remanufactured Nitrogen Oxide (NOx) sensor designed for heavy-duty Cummins aftertreatment systems, including ISX and X15 platforms. This sensor plays a critical role in monitoring exhaust gas composition and maintaining proper SCR efficiency.

Failure of the NOx sensor can result in active fault codes, derate conditions, failed regeneration cycles, and reduced engine performance. Replacing a faulty sensor promptly helps restore emissions compliance and prevent further aftertreatment system issues.

This is a Cummins RX (remanufactured) unit and includes a $289 refundable core charge. Core must be returned in acceptable condition within the specified timeframe to receive a refund.