The ultimate tune for your 4.4L S68 powered G90 G99 BMW M5. The JB4 allows you to go from factory stock to full race and everywhere in between. The JB4 installs and removes easily and includes many unique features not found in any other tune, including user-adjustable 1st and 2nd gear boost limiting, smartphone integration, electronic wastegate control, ethanol fuel support, and built-in advanced CANbus-based diagnostic tools. Installation is easy and completely removable with no splicing or cutting of factory wires making the JB4 an excellent choice for your G90 G99 S68 engine.

No ECU flash needed and compatible with locked 🔒 ECUs

Wirelessly Connect to your JB4: Grab one of our smartphone connection options to wirelessly connect the JB4 BMW tuner to your Bluetooth 4.0 compatible iOS or Android device. Both options allow you to record and analyze vehicle and tuning data, change JB4 performance maps, and update JB4 firmware as we release free newer versions with updates, more powerful maps, and new features under development.

JB4 Mobile by DMAC was released in 2014 and has become the gold standard for phone-to-tuner integration with its unique gauge display options/themes and advanced security systems. The JB4 Mobile app is purchased separately for $29 and requires the JB4 Mobile adapter.

JB4PRO by Burger Motorsports is our brand-new in-house adapter designed from the ground up for ease of use and reliability. Our new adapter fits fully inside the JB4 enclosure for enhanced weather protection and a more streamlined look. The JB4PRO Free app features an intuitive easy-to-use interface, help buttons, and advanced log analysis tools that can estimate the performance of your car and help identify any tuning concerns.

Features:

• Gains are 93whp on pump gas and up to 135 whp on higher octane or E85 mixtures.
  
• Improves 0-60 times and 1/4 mile times
  
• Preloaded with custom S68 ///M 5 JB4 tuning software and up to 8 maps for various fuel and modification levels
  
• Ethanol (E85) compatible tuning maps
  
• Able to read/delete fault codes
  
• View and record up to 40 gauges/engine parameters in real-time with the JB4 app.
  
• Boost by gear in 1st, 2nd, and 3rd can be controlled via the JB4 app for a perfect launch
  
• Compatible with JB4 Mobile for smartphone logging, tuning changes, and adjustment
  
• The JB4 offers a lot more performance, functionality, and safety than your average performance chip
  
• Quick Plug & Play Installation
  
• CANbus OBDII integration offering unrivaled tuning features and performance
  
• Improved performance over non-integrated chip tunes
  
• Runs as smoothly as stock. This is how your vehicle should have come from the factory
  
• Compatible with all driving modes
  
• Fuel economy unchanged during normal driving
  
• 91 octane fuel or better required for performance gains
  
• Not VIN locked and can be removed without a trace and resold down the road
  
• Includes the rugged JB4 billet aluminum enclosure for protection
  
• Made in the USA
  
• 5 year warranty

What's Included:

• Burger Motorsports JB4 Tuner
• Bluetooth Connector

Vehicle Fitment:

• BMW
  
  • 2025+ S68 G90 BMW M5
  • 2025+ S68 G99 BMW M5 Touring