Cummins ECM ECU for CNG/LNG (CM556)
| Supported Controller | CM556 |
| Fuel Compatibility | Natural Gas (CNG) / Liquefied Natural Gas (LNG) |
| Displacement | 5.9L / 8.3L |
| Compatible Engine Series | B5.9G, C Gas Plus, B Gas Plus |
| Voltage | 24V DC |
| Communication Protocol | J1939 / J1708 / ISO 15765 (CAN) |
| Protection Rating | IP67 (Shell Sealing) |
| Operating Temperature | -40°C to +85°C |
| Core Function | Gas Injection Control, Ignition Timing Control, Air/Fuel Ratio Closed Loop Control, Engine Protection Strategy, Fault Diagnosis (DTC) |
| Needs Programming | Calibration Matching Required Using Cummins INSITE Software |
| Weight | Approx. 3.5 kg |
| Warranty | Original equipment warranty / Refurbished parts typically 60 days - 1 year |
Manufacturer No.
3937299P3937299
OEM Part No.
3937299396595339388463965953NX706311AT6A01003997
Engine Part No.
Cummins B5.9GCummins C Gas PlusCummins B Gas PlusCummins ISB 5.9 GasCummins QSB 5.9 GasCummins 5.9L CNGCummins 8.3L CNG
Interchange No.
396595339388463965953NX706311AT3977986P3937299
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Engine System - Industrial Encyclopedia
Genuine aftermarket Cummins ECM/ECU (Part No. 3937299) designed for CM556 series engines running on CNG or LNG. Ensures precise engine management and fuel efficiency.