3687930 | Cummins® Nitrogen Oxide Sensor

Cross Number:

3687930RX, 3687930NX, 4326870, 4326870RX, 2872944, 2872944RX, 5WK96740B, S11110, S11870, 904-6009

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Engine Compatibility: 

Cummins ISX15 (2007–2013)

Cummins ISX11.9 / ISX14.9 (diesel with SCR aftertreatment)

Cummins ISF2.8 / ISF3.8 / ISF4.5

Cummins ISB/ISD Series (4.5 / 6.7 / 3.9 / 5.9 / 6.7 L)

Cummins ISBE / ISBE2 / ISBE4

Cummins B Series (B3.9 / B4.5 / B5.9 / B6.7)

Cummins F3.8 CM2350

Cummins G Series (G3.9 / G5.9)

Cummins ISG11 / ISG12

Cummins QSB3.9 / QSB4.5 (application with NOx monitoring)

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Why Replacement is Important:

A properly functioning NOx sensor is essential for accurate measurement of nitrogen oxides in the exhaust. If the sensor fails or gives incorrect readings, the ECU cannot accurately control urea dosing in the SCR system, which can lead to higher NOx emissions, engine derate, diagnostic trouble codes, and potential damage to aftertreatment components. Timely replacement of worn or faulty sensors helps maintain proper SCR regulation, protects engine performance, prevents costly downtime due to emissions faults, and ensures compliance with environmental standards. Regular sensor maintenance is critical for the long‑term reliability of diesel engines with advanced emission controls.

Manufacturer Information:

Cummins is a global leader in diesel and natural gas engine technology, known for durable, high‑performance power solutions across commercial, industrial, and heavy‑duty applications, with a strong focus on fuel efficiency, reliability, and emissions compliance.

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Warranty:

PartsMove offers a 365-day warranty on all parts, regardless of their condition. This warranty is valid only for purchases made directly on our website (partsmove.com). Purchases made through third-party platforms, such as eBay or Amazon, are not covered by this warranty.