Cummins ISX, ECMs, (GOOD USED & BENCH TESTED W/ WARRANTY) Cummins ISX ECM Part # 3684009 For Sale, EGR Model, CM870, Part # 3684009, Fits 2007 2008 2009, ECM Code: AB10416.18, ECM Serial # 26111647, Stock # 8057 | Tested & Inspected!