Used 2003 OEM 5.9 Cummins Diesel ECU Engine Computer Automatic Dodge Ram 2500 3500 Part# 3963994. Pulled From a Good Running Salvage 2003 Dodge Ram 2500 Cummins Diesel with Automatic Transmission 4X4 Crew Cab Short Box Laramie with Sunroof/Leather. Stock # 22126 Item is in good working condition. All Modules have to be reprogrammed/repaired. We do not provide reprogramming/repair service. We are also not responsible for any kind of labor cost or reprogramming cost.