2003 Dodge Ram 5.9 24 Valve Auto or Manual 3963994 Cummins ECM

Remanufactured 2003 Cummins ECM — Part #3963994 — fits both automatic and manual transmission applications. VIN programmed with the latest software updates.

• Fits 2003 Dodge Ram with automatic or manual transmission
• OEM part number: 3963994
• Fully remanufactured and tested for reliable performance
• VIN programmed to your specific truck — send your VIN upon purchase
• 1-year warranty included — return your original core to activate
• No core charge — just return the old unit in good cosmetic condition

Signs your 2003 Cummins ECM may be failing

• Truck cranks but will not start, or will not crank at all
• Check engine light or "no communication" codes when scanned
• Stalling, rough running, or sudden loss of power
• Dash gauges or warning lights acting erratically

Frequently asked questions

Will this fit my truck? This ECM is for 2003 Dodge Ram pickups with the 5.9 24 Valve Cummins diesel and automatic transmission. Not sure? Call us with your VIN and we will confirm.

Do I need to program it? No. We VIN program it to your truck before it ships, so just send your VIN with your order.

Questions? Contact us at 1(812)219-9121 or find us on Facebook and Instagram @Crites.Diesel.