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Refurbished MS3Pro Ultimate

Refurbished MS3Pro ULTIMATE Standalone ECU



Out of stock

SKU: B_MS3V-U Category: Tags: , , , Brand:


While supplies last, Refurbished MS3Pro ULTIMATE standalone ECU with TunerStudio license, documentation & installation files via USB drive.  Choose from the following options:

Visit the MS3Pro ULTIMATE page for a complete list of features.

ALL REFURBISHED ITEMS have been tested, repaired if necessary, re-tested and have passed identical quality assurance testing as first quality. You should expect refurbished items to have reasonable cosmetic wear and tear such as scratches, small dents and mounting marks that will not affect the item’s normal operation.

All refurbished items arrive with a 90 day warranty and are considered FINAL SALE.

*All parts are sold for OFF ROAD RACE-ONLY, ground-vehicle use only. Aftermarket EFI/EMS systems are not for sale or use on pollution controlled roads/ vehicles. Alteration of emission related components constitutes tampering under the US EPA guidelines and can lead to substantial fines and penalties. Your state/district may also have specific rules restricting your tampering with your vehicle’s emissions system.

Drivers for the USB connection are on the FTDI website.

The latest MS3Pro firmware & tuning software can always be accessed at

What is in the box?

  • Refurbished MS3Pro ULTIMATE Standalone EFI Controller
  • USB Drive with Software, Documentation, Wiring Guides
  • Includes TunerStudio registration code (register at

Are the connectors included for use building my own wiring harness?

  • ECU ONLY, connectors/ harness not included. They are sold separately.

What is the warranty on the Refurbished MS3Pro ULTIMATE?

  • It carries a 90 day warranty against manufacturing defects.

How watertight is the box?

  • The case uses an o-ring seal and sealed connectors to ensure it is completely splashproof, and will keep water out if completely immersed up to a few inches for a few  minutes (which normally shouldn’t happen, right?).  If you need further water submersion resistance that can be accomplished with a small bead of silicone just inside/outside of the o-ring.

Can I run big low impedance fuel injectors with Ultimate?

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