This is the Real Deal. Not a Reprogrammed Core.

Your truck’s ECM is its brain. When it fails, you need the correct part, period. This is a genuine Mopar OEM Engine Control Module, part number 580377. It’s the exact module that came installed on your 2019 Ram 3500 with the 6.7L Cummins turbo diesel and automatic transmission.

We don’t sell used cores or questionable remanufactured units. This is a new, factory-grade OEM module. It’s a direct plug-and-play replacement. Install it, perform a quick relearn procedure with a capable scanner, and your truck is back in business.

Why You Must Buy the Correct OEM ECM:

• Exact Fit & Function: No wiring harness modifications. No compatibility guesswork. This ECM matches your truck’s VIN-specific calibration for fuel injection, turbo control, and emissions systems.
• No Downtime: Buying a used or aftermarket module often means sending your old one out for programming, leaving your truck dead for weeks. Our module ships ready to go.
• Protect Your Investment: The 6.7L Cummins is a serious engine. Running it with an incorrect or poorly programmed controller risks performance issues and potential damage. Don’t risk it.
• Simplified Installation: Located on the left (driver) side of the engine block. Swap the connectors, bolt it in, and connect your scanner.

What You Need to Know Before Ordering:

Verify Your Part Number. Double-check the number on your failed ECM. This module, 580377, is also known by internal codes T127 and 6B12651B. Cross-reference with your VIN for absolute certainty.

Professional Installation & Programming Required. This is not a simple bolt-on. Installation requires mechanical knowledge. Critical: The new ECM will need to be configured for your specific vehicle using a professional-grade diagnostic tool (e.g., WiTECH, Snap-on, or equivalent) to complete the VIN write, security gateway access, and system relearn. This is a standard procedure for any new ECM.