Bootmod3 ECU Tune – BMW N20 / N26 (228i / 328i / 428i / 528i / X-Series)

The Bootmod3 (BM3) ECU Tune gives your BMW N20 or N26 engine a complete performance transformation. Flash maps, log data, and control features like burble, flex fuel, and boost levels — all directly through your OBD port. Designed for daily drivers and track builds alike, Bootmod3 delivers OEM reliability with performance-tuned responsiveness.

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CustomROM Features

• Map Switching: Instantly toggle between up to four maps using steering wheel cruise controls.

• Flex-Fuel Capability: Automatically adjusts fueling and timing for any ethanol mix (E0–E85).

• Anti-Lag: Builds boost pre-launch or during rolling starts for instant power delivery.

• Integrated Map Editor: Over 4,000 editable tables for precise tuning adjustments.

• High-Throughput Datalogging: Log 80+ channels in real time with exportable data.

• Ethanol Content Display: View ethanol percentage directly on the factory RPM gauge.

• Advanced Features: Includes cold start delete, top-speed limiter removal, torque limit control, and burble sound adjustment.

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Power Gains (OTS Maps — N20 / N26)

Power increases vary by fuel quality and supporting modifications.

Aggressive burble (AGG) versions of OTS maps available.

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Supported Vehicles (N20 / N26 Engine)

• 220i / 228i

• 320i / 328i / 428i / 528i

• X1 / X3 / X4 with N20/N26 engines

• Supports both N20 (global) and N26 (ULEV-certified North American) variants

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Requirements

• Bootmod3 License (sold per VIN) — this is the item being purchased in this listing.

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

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Disclaimer

For off-road use only. Not intended for use on public roads.