Cummins ISX ECM P/N: 3683289 EGR-Model CM870 Engine Computer TESTED & WORKING. The item "Cummins ISX ECM P/N 3683289 EGR-Model CM870 Engine Computer TESTED & WORKING" is in sale since Tuesday, April 9, 2019. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Computer, Chip, Cruise Control\Engine Computers". The seller is "braylentransport6" and is located in Buchanan, Georgia. This item can be shipped to United States.