Burger Motorsports JB4 engine controller (inc.. Bluetooth), BMW S68 M5 G90/G99

JB4 Plug & Play Tuner – BMW G90 M5 (S68)

Easy extra power for the brand new M5 – without touching the factory ECU.

The latest G90 BMW M5 uses the all-new 4.4L twin-turbo S68 engine, controlled by one of the most heavily locked factory ECUs BMW has ever made. Traditional tuning is nearly impossible – but with the JB4 system you can unlock huge gains safely and easily. JB4 connects directly to engine sensors, delivering performance increases of up to +80hp and +120Nm depending on fuel and setup, all while keeping the factory ECU and safety systems intact. No coding or permanent modifications required. Plug it in, enjoy the power, and remove it anytime. 100% reversible.

Key features:

• Up to +80hp and +120Nm depending on fuel quality and configuration
• Dyno-proven gains on pump fuel, E85 blends, and race gas
• Switch between multiple maps on the fly using the JB4 app
• Data logging, boost control, fuel adjustment and safety systems included
• CANbus integration for advanced features like boost-by-gear and code reading
• Bluetooth support (via optional JB4 Mobile adapter) for map switching and logging from your phone
• Fully reversible – restore your car back to stock in minutes

Why JB4? It’s the only tuning solution currently available for the locked S68 ECU that doesn’t require invasive modifications. Perfect for owners wanting extra performance with factory reliability and the option to return to stock anytime.

View installation guide (PDF)