bootmod3 (BM3) Boot Mod 3 BMW B58 ECU Tune/Remap Software Licence/License + FREE ENET OBD2 Cable - UK Stock - OBD Flash Stage 1/2, OTS Maps, DME Mapping for M140i M240i 340i 440i 540i 640i 740i 840i G20 M340i X3/X4 M40i Z4 M40i

BMW B58 ECU Software Licence with FREE Ethernet OBD Cable - UK Stock

Unlock serious performance, throttle response and drivability from your 3.0 turbo BMW with the official bootmod3 licence for the B58 engine. This at-home OBD flash solution delivers proven gains and factory-level safety while keeping everyday refinement. Perfect for M140i, M240i, 340i, 440i, 540i, 640i, 740i, 840i, G20 M340i, X3 M40i, X4 M40i and Z4 M40i owners who want reliable power on UK roads and tracks.

We run this software on our own B58 cars and our customers love the smooth, factory-like integration with huge midrange torque. Expect rapid OBD flashing, effortless map switching, in-depth datalogging and easy diagnostics using your phone, tablet or laptop. UK stock with a quality ENET lead included makes this the simplest, most complete B58 tuning package.

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Why this B58 tuning licence is a winner

• Free high-quality ENET Ethernet to OBD2 cable included for fast, stable flashing
• Cloud-connected tuning platform with iOS, Android and web access
• No ECU posting or downtime - flash through the OBD port at home
• One OTS map included, with an optional OTS bundle for more calibrations
• OEM-like safety strategies, comprehensive datalogs and easy revert to stock

Power gains, stages and fuel options

Choose the right calibration for your setup, then swap maps in seconds in-app.

• Stage 1 91 AKI fuel - up to 18 percent horsepower, 26 percent torque
• Stage 1 93 AKI fuel - up to 20 percent horsepower, 26 percent torque
• Stage 2 91 AKI fuel - up to 24 percent horsepower, 32 percent torque
• Stage 2 93 AKI fuel - up to 26 percent horsepower, 32 percent torque
• Aggressive burble variants available on Stage 2
• E30 blend and race fuel maps in development

UK fuel guide: 91 AKI is roughly 95 RON, 93 AKI is roughly 98 RON.

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Features enthusiasts search for

• Live map switching and in-app gauges
• Extensive datalogging - hundreds of channels, up to 40 at once
• Fault code read and clear across vehicle modules
• Reset adaptations including octane, knock and Valvetronic
• ECU power cycle and quick revert to stock file
• Optional full OTS map bundle or custom tuning via the BM3 Tuner Directory
• Built-in map editor for self-tuners

Popular adjustments and extras

• Top speed limiter removal
• Exhaust burble control and exhaust valve adjustments
• Cold start noise reduction for quieter starts
• Cat efficiency check suppression for off-road use only when using de-cat hardware
• Support for upgraded turbos, E blends, race fuel and meth injection
• Custom throttle mapping and backend flash support

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Compatible B58 models

Fits a wide range of B58-powered BMWs. If you are unsure, contact us.

• F20 F21 M140i
• F22 F23 M240i
• F30 F31 F34 340i
• F32 F33 F36 440i
• G30 G31 540i
• G32 640i
• G11 G12 740i 740Li
• G14 G15 G16 840i
• G20 M340i
• G01 X3 M40i
• G02 X4 M40i
• G29 Z4 M40i

Important

• Late 2019 onward cars may require a bench unlock of the DME before OBD flashing
• Vehicles updated with newer BMW software may also need a bench unlock

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What you get

• Official bootmod3 B58 software licence - Part number: BM3-B58
• Free ENET OBD2 cable for reliable Ethernet flashing

Optional add-on

• bootmod3 OBD WiFi Agent - convenient wireless flashing without a laptop

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Fitting and support

Most B58 cars flash through the OBD port with the included ENET lead. No ECU removal required. If your vehicle needs a bench unlock due to a BMW software update, we can help.

Prefer us to handle it end to end

Book professional installation with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

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Legal and warranty

Some items used or installed with PRO TUNING FREAKS bootmod3 may impact manufacturer warranty. Certain configurations are not legal for road use. The customer is responsible for compliance with local laws and regulations.

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Why buy from MJ Modifications

• UK-based B58 specialists with first-hand experience running this software
• Free ENET cable included so you can flash straight away
• Trusted by M140i, M240i, 340i, 440i, 540i, 640i, 740i, 840i, M340i, X3 M40i, X4 M40i and Z4 M40i owners across the UK

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