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YUCHAI HD 4G-120 ECM Engine Control Module (ECM)
Genuine YUCHAI HD 4G-120 ECM Engine Control Module designed for heavy-duty CNG and LNG engines. This OEM controller (SN1000-3823351) features a 9-36VDC operating range, extreme temperature resistance (-40°C to 120°C), and E4 certification to guarantee reliable performance and precise fuel management for your commercial vehicle.