• Mercury Marine Mercruiser ECM0401 ECM0501 ECM555 ECM 555 Motorola ECU Repair Service
1 1

Mercury Outboard Marine Mercruiser ECM0401 ECM0501 ECM555 ECM 555 Motorola ECU Repair Service

Mercury Outboard Marine Mercruiser ECM0401 ECM0501 ECM555 ECM 555 Motorola ECU Repair Service

$499.00 USD
$499.00 USD
Sale Sold out
Shipping calculated at checkout.

Professional Mercury Marine Mercruiser ECM Repair Service

ECM0401 ECM0501 ECM555 ECM 555 
Motorola 

Mail-In Repair Service

Get Your Boat Back on the Water with Expert ECM Repair

Is your Mercruiser engine experiencing mysterious shutdowns, blown fuses, or throwing fault codes? Our specialized mail-in ECM repair service provides fast, reliable solutions for marine engine control modules.

Compatible Mercruiser ECM Models We Service

Part Numbers: ECM 0501, 865926, 8M2000443, 891952011, 8M0083213, ECM5550202, PN: 866191-002, 892204, 865926A01, 885640-001, ECM0402, 866191002, ECM0401, 891952-034, ECM53412369, 89772721T, 884521

Applications:

  • Mercury 4.7L V6 MPI
  • Mercury 5.0L V8 MPI
  • Mercury 5.7L V8 BRAVO
  • 350 MAG MPI (2006 Searay 320DA and similar)
  • 2006-2007 MIE 350 Mag MPI (closed cooling, s/n 0W690000-1A089999)
  • 2008 5.7L MPI MIE (closed cooling, s/n 1A090000-1A091825)

Hardware Versions: WQ022GG1, WQ00KKZ1, WQ01ZAE1, WQ00RELI, WQ01QUP1
Software Versions: M2002283, 866189-002, 8M2002289, 866191-002, 8M2002293

Common ECM Problems We Fix

Experiencing any of these issues?

✓ Blown fuses or electrical failures
✓ No communication with diagnostic tools
✓ Unexpected engine shutdowns
✓ Persistent fault codes
✓ Intermittent performance issues
✓ Oil intrusion damage
✓ Water damage corrosion
✓ Injector driver failures

Don't replace, repair and save! A new Motorola Mercruiser ECM can cost $1,500+. Our professional repair service gets you back on the water for a fraction of the replacement cost.

About the Motorola Mercruiser 

The Motorola ECM (Engine Control Module) is the brain of your Mercruiser marine engine. This sophisticated computerized system continuously monitors and controls critical engine functions including fuel injection timing, air-fuel ratios, and ignition performance.

Built for Marine Durability: Engineered to withstand harsh saltwater environments, constant vibration, temperature extremes, and moisture exposure, but even the toughest electronics can fail over time.

ECM Compatibility Chart

Part Numbers, if you do not see your part number, please contact us! Engine Size Description
864270-006, 864270-007, 864270T06, 864270T07 4.3L ALPHA
865000-003 4.3L ALPHA FWC
864375-3 4.3L BRAVO
864271-3, 864271-4, 864271-005 5.0L ALPHA
865002-002 5.0L ALPHA FWC
864376-3, 864376-4, 864376-005 5.0L BRAVO
865003-1, 865003T01-T03 5.0L BRAVO FWC
864272-5, 864298-3, 864298-006, 864272-006 350 Mag MIE/ALPHA
864377-3, 864377-4 350 Mag BRAVO
864299-006 350 Mag TOW SPORT
865155-001 350 Mag BLACK SCORPION
864300-3 MX 6.2L MIE
864273-3, 864273-4 6.2L BRAVO
865364-001 496 MAG BASE

Other part numbers:  8M0059789, 898369T01, 898369TO1

View full details

Getting Started

Submit Your Work Order

Fill out our simple work order form to get your unique work order number. We'll email you shipping instructions immediately. Ship your module to us using any carrier (USPS, FedEx, UPS). Include your work order number with your shipment.

What's Covered

Thorough Bench Testing

Every module is tested before and after repair to ensure full functionality. If your unit tests fine, shows no issues, or is deemed non-repairable, a bench fee applies. We'll contact you before charging anything beyond the base service fee.

What to Expect

Turnaround & Warranty

✓ Turnaround: 2-3 business days (complex jobs may take longer)

✓ Warranty: 6 months on repairs we perform

✓ Programming: Not required—plug and drive

About ECU Maverick — Expert ECU Repair & Programming Services

ECU Maverick specializes in component-level ECU repair and programming for European, domestic, and specialty vehicles. Based in Fort Myers, Florida, we serve independent repair shops, dealerships, and vehicle owners nationwide.

Where most shops rely on reprogram-and-replace methods, we take a different approach. Our technicians diagnose and repair individual circuits at the board level, restoring modules that others write off as failures. This expertise comes from years of reverse engineering and bench testing across thousands of control units.

Vehicles We Service

We specialize in European automotive electronics, including BMW, Mercedes-Benz, Audi, Porsche, Land Rover, Bentley, Ferrari, Lamborghini, Maserati, and Aston Martin ECU repair. We also service domestic vehicles, heavy equipment control modules, and marine electronics systems.

Why Shops and Owners Choose Us

Fast Turnaround — Most ECU repairs ship within 2–3 business days. Same-day rush service available.

Plug-and-Play Ready — Every module leaves fully programmed and coded to your vehicle. No dealer visit required.

Direct Communication — Text or call us and speak with a real technician. No ticket queues, no waiting.

6-Month Unlimited Mileage Warranty — Drive with confidence. Our warranty covers you regardless of how many miles you put on.

Our Commitment

We exist to keep your vehicle out of the dealership and back on the road—with reliable repairs, transparent pricing, and expert support from start to finish. Every job receives the same attention we'd give our own vehicle.