BMW M3 & M4 F80 / F82 / F83 Fabspeed ECU Handheld Tuner

Fabspeed’s handheld tuner Includes an OBD-II cable, USB cable, and USB drive loaded with tuning software and full installation instructions

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Achieve maximum power gains and driveability without sacrificing reliability. Easily flash your BMW M3/M4 with a Fabspeed ECU Tune utilizing the included handheld device.

Fabspeed Motorsport offers an alternative tuning method for vehicles equipped with ECU’s that traditionally required bench flashing. No longer do you need to remove your ECU and mail it in for a tune. The Fabspeed device interfaces with the OBD-II port on your BMW and your computer to complete the tuning process, which is as follows:

  1. Read stock data on vehicle via OBD-II port with handheld tuner
  2. Interface tuner with software on your computer and send in data to Fabspeed Motorsport via email
  3. We use this data along with information you provide about your vehicle to write a tune for your specific setup and email back your custom tune in 1-2 business days
  4. Write the Fabspeed ECU Tune to your tuner, then to the vehicle with the tuner
  5. Enjoy your increased performance!

No need to send your ECU in to return to stock – simply use the MyGenius to flash back, then to your Fabspeed ECU Tune again at any point!


  • Fits all BMW M3/M4 E9X vehicles (2015+)
  • +75 Horsepower | +100 Torque


  • You must review our Fabspeed Handheld ECU Tuning Guide from the Installation Instruction link above and email the completed form to us. We utilize this form to ensure we meet your needs and consider your modifications to deliver the best possible results.
  • You must have access to a PC / Windows computer (Mac OS not supported) to upload your factory file information to us via email and in turn apply our ECU Tune to your tuning device.
  • Upon sending us your vehicle information, our tuner will email you a custom ECU Tune(s) within 1-2 business days.
  • The tuning device “marries” with your vehicle and can only be used on one vehicle.


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