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

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Getting Started

Start a request

Open a request in MavConnect, our customer portal, and tell us the vehicle, the module and what it's doing. A technician reviews it and sends your Technical Review — the price and the shipping instructions — in writing. Accept it, ship the module with any carrier (USPS, FedEx or UPS), and write your request number on the box.

WHAT'S COVERED

A technician looks first

Every request starts with a $195 Technical Review: a technician checks your part number, codes and photos against this service and confirms it's the right call before you ship anything. Go ahead with it and the $195 comes off your price. Want the module measured on the bench before we work on it? Add bench evaluation when you submit — $195 per hour, and you'll know the hours before we start.

WHAT TO EXPECT

Turnaround & warranty

✓ Turnaround: stated in your Technical Review and counted from the day your module reaches our bench.  

✓ Warranty: six months on rebuilds and programmed replacements, when installed by a licensed shop.

✓ Programming: your module comes back with its own programming — plug in and drive. Programmed to your VIN — plug in and drive"

About ECU Maverick — ECU Repair, Rebuilding & Programming Specialists

ECU Maverick rebuilds, programs and clones control modules for European, domestic and specialty vehicles. Based in Fort Myers, Florida, we work with independent shops, dealerships and vehicle owners nationwide — by mail.

Where most shops replace and reprogram, we work at the board level: our technicians rebuild the circuits that fail, bringing back modules others write off. That comes from years of reverse engineering and bench work across thousands of control units.

Vehicles We Service

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

Why Shops and Owners Choose Us

Price in writing first — Your Technical Review gives you the exact price before you ship. No surprises, and the $195 comes off your price when you go ahead.

Plug-and-play ready — Rebuilt modules keep their programming; replacements are programmed to your VIN. No dealer visit.

A technician, in writing — Every answer comes from the technician who has your file, on your request in MavConnect. You can read it twice, share it with your shop, and come back to it a year later.

Six-month warranty — On rebuilds and programmed replacements, when installed by a licensed shop. Full terms on your request.

Our Commitment

We exist to keep your vehicle out of the dealership and back on the road — a technician's honest answer, a price in writing, and the same care we'd give our own car, from the first message to the day the module is back in your hands.