Car & Truck Parts. Water Pump & Oil Pump. Engine Overhaul Rebuild Kit. Genuine QSB 4.5 Engine ECM Control Module 4993121 4993120 For Cummins Hyundai R330LC-9A. PART # 4993121 CAST AS 4993120 ECM 4.5 QSB Electronic Control Module. Please note: This is the genuine cummins part. Full name, correct telephone number and detailed Physical Address (home or office address) but not PO Box/APO/FPO address are necessary. SINO-CPC Parts Store is wholesaler which specialist in excavator and construction machinery spare parts. For KOMATSU, HITACHI, VOLVO, CATERPILLAR, Doosan, Hyundai, Kobelco etc.. Wholesale Price to All. Electric Parts: Monitor(We can set the time), Controller, Throttle motor, Sensor, Solenoid, Wire harness, Relief Valve etc. Engine Parts: Liner kit (Piston, pin, ring, liner), Bearing main & Connect Rod, Gasket Kit, Injector, Cylinder Head, Cylinder Block etc. Cooling System: Radiator, Hydraulic Oil Cooler, Inter Cooler. Hydraulic Parts: Pump Assembly & Spare parts, Final Drive and Gearbox, Swing Motor, gearbox etc.