A NOx (nitrogen oxide) sensor is a component that is integrated into marine engines to measure the concentration of NOx in the engine’s exhaust gases. NOx is a major contributor to air pollution and a known cause of acid rain and smog. Marine engines must comply with international emissions regulations and operate with minimal environmental impact. The use of a NOx sensor enables the engine’s emissions to be monitored and controlled, allowing operators to optimize the engine’s fuel efficiency and reduce its emissions output. The sensor provides real-time data on the concentration of NOx in the exhaust gases, which can be used to adjust the engine’s fuel-air mixture and timing to minimize NOx emissions while maintaining engine performance. Furthermore, the NOx sensor can be used to monitor the health of the engine, as a malfunction will cause an increase in NOx emissions. Overall, the NOx sensor is a crucial component in the effort to reduce marine engine emissions and ensure compliance with environmental regulations.

  • 1. Caterpillar C32 ACERT Marine Engines: This model is equipped with a zirconium oxide NOx sensor.
  • 2. MAN 175D Marine Engines: This model is equipped with a non-dispersive infrared NOx sensor.
  • 3. Volvo Penta D16 and D13 Marine Engines: These models are equipped with a tunable diode laser NOx sensor.

Here is a list of OE part numbers for NOx sensors used in marine engines:

  • 1. Caterpillar OEM Part Number 321-3600: This NOx sensor is used in Caterpillar C32 ACERT Marine Engines.
  • 2. MAN OEM Part Number 51.27119-0018: This NOx sensor is used in MAN 175D Marine Engines.
  • 3. Volvo Penta OEM Part Number 21585810: This NOx sensor is used in Volvo Penta D16 and D13 Marine Engines.
  • 4. MTU OEM Part Number A0091534828: This NOx sensor is used in MTU marine engines such as the Series 2000 and Series 4000.
  • 5. Detroit Diesel OEM Part Number A0009053603: This NOx sensor is used in Detroit Diesel marine engines such as the Series 60 and Series 4000.
  • 6. Cummins OEM Part Number 4326868: This NOx sensor is used in Cummins marine engines such as the QSK 38 and QSK 50.
  • 7. Mercury OEM Part Number 8M6000623: This NOx sensor is used in Mercury Marine engines such as the 4.5L V6 and 6.2L V8.
  • 8. Yanmar OEM Part Number 119574-66810: This NOx sensor is used in Yanmar marine engines such as the 4JH4-HTE and 4JH3-TE.
  • 9. Wartsila OEM Part Number 3401607: This NOx sensor is used in Wartsila marine engines such as the Wartsila 32 and 34DF.
  • 10. Scania OEM Part Number 2138442: This NOx sensor is used in Scania marine engines such as the DI16M and DI13M. 
  • 11. Perkins OEM Part Number 4709944: This NOx sensor is used in Perkins marine engines such as the Sabre and M92B.
  • 12. Deutz OEM Part Number 04197685: This NOx sensor is used in Deutz marine engines such as the TCD 2015 V8.
  • 13. Yanmar OEM Part Number 129670-91150: This NOx sensor is used in Yanmar marine engines such as the 6LY3-STC.
  • 14. Hyundai Seasall OEM Part Number 3935044461: This NOx sensor is used in Hyundai Seasall marine engines such as the S270S.
  • 15. John Deere OEM Part Number RE570818: This NOx sensor is used in John Deere marine engines such as the 4045AFM85 and 6090HF485.
  • 16. FPT/Iveco OEM Part Number 5801437502: This NOx sensor is used in FPT/Iveco marine engines such as the N67 570 e N67 450.
  • 17. MAN OEM Part Number 51.10301-7571: This NOx sensor is used in MAN marine engines such as the D2876 LE409.
  • 18. Volvo Penta OEM Part Number 22216296: This NOx sensor is used in Volvo Penta marine engines such as the D4, D6 and D8.
  • 19. Doosan OEM Part Number A117052: This NOx sensor is used in Doosan marine engines such as the Marine diesel engine L136TI.
  • 20. Suzuki OEM Part Number 99105-00132: This NOx sensor is used in Suzuki Marine engines such as the DF200 and DF250.
  • 21. Kawasaki OEM Part Number 21176-0776: This NOx sensor is used in Kawasaki marine engines such as the Ultra 310 series.
  • 22. Alfa Laval OEM Part Number 21570617: This NOx sensor is used in Alfa Laval marine engines such as the PureSOx Exhaust Gas Cleaning System.
  • 23. Rolls-Royce OEM Part Number 1492318: This NOx sensor is used in Rolls-Royce marine engines such as the MT30 Gas Turbine engine.
  • 24. Mitsubishi OEM Part Number ME302530: This NOx sensor is used in Mitsubishi marine engines such as the S12A2-Y3MPTAW.
  • 25. Yanmar OEM Part Number 119574-91150: This NOx sensor is used in Yanmar marine engines such as the 4BY2-150 and 4BY2-180.
  • 26. JCB OEM Part Number 320/06685: This NOx sensor is used in JCB marine engines such as the JCB444 TCAE-63.
  • 27. Penta Marine OEM Part Number 3808600: This NOx sensor is used in Penta Marine Engines such as the D13-700.
  • 28. GE OEM Part Number 5111936-001: This NOx sensor is used in GE marine engines such as the L250 and L250+.