BootMod3 BM3 BMW F‑Series N20/N26 OBD Flash Tuning Software License 125i 220i 228i 320i 328i 420i 428i 520i 528i Stage 1/2 OTS Maps, Map Switching, Datalogging

BMW F-Series 2.0 Turbo ECU Calibration Licence by BM3 - N20 and N26

Give your BMW 2.0T the performance it deserves with the BM3 software licence for N20 and N26 engines. This is the go-to engine management upgrade for owners of 125i, 220i, 228i, 320i, 328i, 420i, 428i, 520i and 528i who want stronger mid-range punch, crisp pedal response and smooth, OEM-like drivability. We run this calibration on our own cars and our customers love the results - fast to install, easy to use and completely reversible.

Key benefits

• ECU programming via the diagnostic port - no opening the control unit.
• Switchable calibrations for different fuel grades and hardware setups using your phone or laptop.
• Use-your-own vehicle software base for factory-level refinement and drivability.
• Return-to-stock in minutes for servicing, with the option to re-lock the DME.
• Offline programming available after initial activation.
• Cloud-managed platform with web app plus iOS and Android support.

Vehicle compatibility

For BMW F-Series with the 2.0-litre turbocharged petrol N20 or N26 engine: 125i, 220i, 228i, 320i, 328i, 420i, 428i, 520i and 528i. Also commonly searched by chassis: F20, F21, F22, F23, F30, F31, F32, F33, F10 and F11.

Stage options and fuel choices

Choose the calibration to suit your setup and petrol quality. Off-the-shelf Stage 1 and Stage 2 maps are available for common hardware configurations, with support for 95 RON, 97/98/99 RON and ethanol blends where applicable. Want a tailored solution? Collaborate with a professional calibrator through the BM3 cloud for a bespoke tune.

What’s included and upgrade options

• One OTS calibration included with purchase (plus any maps listed as free).
• Upgrade to the OTS bundle for access to all available presets for your car.
• Advanced Tuning Solution integrated for custom mapping with your chosen pro tuner.

Enthusiast features

• Data logging of hundreds of parameters with shareable charts.
• Live gauges for real-time monitoring with configurable alerts.
• Diagnostics across modules - read and clear fault codes, reset adaptations.
• Map configuration using toggles and sliders inside the app.
• Exhaust burble intensity control, tied to drive modes.
• Boost-by-gear setup for improved traction.
• Top speed limiter removal.
• Cold start catalyst heating control.
• Cat efficiency check configurability for high-flow downpipes (for off-road use only).
• Recalibrated iDrive Sport Displays.
• Support for race fuel and ethanol blends where applicable.

Why choose MJ Modifications

• BMW performance specialists with extensive hands-on experience with BM3 on N20 and N26 engines.
• We’ve installed, tested and daily-driven this software - proven reliability and excellent feedback.
• Friendly advice before purchase and support after you’re up and running.

Fitting and support

Prefer a professional to handle the setup, first flash and road test? Book our in-house service at MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and scheduling.

Important notes

• Always select the map that matches your hardware and fuel. Follow in-app guidance.
• Features relating to catalytic monitoring should only be used where legal and are intended for off-road use.

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