Cummins ISX ECM ECU Engine Computer Control Module 3684009 CM870 CPL 8520 Tested

  

OEM Cummins ISX EGR ECM ECU 450HP P/N: 3684009 CM870 ESN: 14045162 CPL8520 Tested. Used Takeoff Unit - Carefully Removed From Running Vehicle. Bench tested to verify condition. Unit Pictured is the one you will receive.

Other P/N That Will Work. 3682729, 3682729RX, 3682729NX, 3684009, 3684009NX.