BMW M850i (2020) Custom ECU Tune




Tuning Stage
ECU Unlock
  • Brand: 412 Motorsport
  • Availability: In Stock

Experience Unmatched Power Gains:

    Factory: 523 HP / 553 lb-ft
    Stage 1 Tune: 680 HP / 626 lb-ft | +157 HP / +73 lb-ft (30% / 13.2%)
    Stage 2 Tune: 700 HP / 650 lb-ft | +177 HP / +97 lb-ft (33.8% / 17.5%)

Expert Precision with Custom Tuning

Each of our tuning files is 100% tailored and expertly designed to meet your exact vehicle's needs and specifications. You can install these custom tunes effortlessly in less than 30 minutes once we send you the custom file.

  • Stage 1: Perfect for stock vehicles.
  • Stage 2: Crafted for vehicles with upgraded downpipes.
  • Stage 3: For vehicles with upgraded turbos, E85, and other performance upgrades. Contact us for details.
  • Simply plug in & upgrade your ECU

    We will ship you one of our My Genius handheld devices to make power boosts a plug-and-play affair. Only a Windows 7+ PC is needed to swap files - everything else, from the handheld devices to to instructions, is in the box!is in the box!

    Engine Control Unit (ECU) Unlock

    All BMW vehicles after June 2020 require ECU unlock. Simply send us your ECU, and our experts will carefully unlock its capabilities. This comprehensive service is included in the price and typically requires 2-3 weeks to complete.


    • - Extend or add burble
    • - Calibrate the tune for your octane rating
    • - Perfect the tune for every additional upgrade on the vehicle
    • - Top speed limiter removal
    • - Check engine light removal for downpipes (Stage 2 & For off-road use only)
    • - Cold start delete - On/Off

    The Perfect Tune, Guaranteed:

    Unmatched 30-Day Performance Guarantee: 100% satisfaction or your money back.

    Switch Back Anytime:

    We ensure your original ECU settings are saved, allowing you to revert anytime.

    Have a Question?

    If you have any questions or concerns, don't hesitate to reach out to us via email at or contact us at any time using our convenient 24/7 Chat Widget below.

    ** Note: All tunes are for race purposes only