Bootmod3 ECU Tune – BMW S55 (F80 M3 / F82–F83 M4 / F87 M2 Competition)

The Bootmod3 (BM3) ECU Tune transforms your BMW S55 engine — found in the M3, M4, and M2 Competition — into a fully tunable platform with advanced CustomROM capabilities. Flash maps, log data, and adjust performance features directly through the OBD port using your mobile device or computer.

Bootmod3 delivers everything from daily drivability to full race calibration in minutes, making it one of the most capable flash solutions available for the S55 platform.

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CustomROM Features

• Map Switching: Instantly switch between up to four maps using steering wheel cruise control buttons.

• Flex-Fuel Tuning: Automatically adjusts for any ethanol blend (0–100%) using a Flex Fuel sensor.

• Anti-Lag: Build boost while stationary or rolling for instant throttle response.

• Integrated Map Editor: Access up to 5,000+ tuning tables for advanced calibration.

• Ethanol In-Dash Indicator: Displays ethanol percentage via the RPM gauge.

• High-Speed Datalogging: Log over 80 RAM channels with unmatched throughput.

• GTS/CS Transmission Flash: Included for DCT-equipped vehicles.

Additional supported features include burble adjustment, cold start delete, OPF/PPF removal, top speed limiter removal, boost-by-gear tuning, and sport gauge recalibration.

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Power Gains (OTS Maps – S55 Engine)

Aggressive burble (AGG) versions of OTS maps also available.

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Supported Vehicles (S55 Engine)

• F80 M3 (2014–2020)

• F82 / F83 M4 (2014–2020)

• F87 M2 Competition (2018–Present)

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Requirements

• Bootmod3 License (sold per VIN) — this is the item you are purchasing in this listing.

• BM3 WiFi Adapter or OBD ENET cable (sold separately) — required for flashing and datalogging.

• Note: 2019+ S55 models with March 2019 software require bench unlock. If your vehicle was produced after March 2019, contact support@protuningfreaks.com for unlock details.