Browse Cummins ISX12 G Engine Control Modules (ECM) on MyLittleSalesman.com and compare listings with prices from $500 to $1,025. Sellers include CRG Heavy Truck Parts, Rydemore Heavy Duty Truck Parts, and Vander Haag's. Filter by condition, price, or year to quickly narrow down to the right Cummins ISX12 G Engine Control Module (ECM).