Enhance Your BMW M5’s Performance with the JB4 Tuner for the 2025+ S68 G90 Engine
Unlock up to 135whp with the JB4 tune for your 2025+ BMW S68 G90 M5. Whether you're running on pump gas or higher-octane fuels/E85 mixtures, the JB4 offers impressive gains, smoother power delivery, and unmatched tuning flexibility.
Key Features & Benefits of the JB4 Tuner:
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Significant Power Gains:
- 93whp on pump gas
- Up to 135whp on higher octane or E85 mixtures
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Enhanced Performance:
- Improved 0-60 times
- Faster 1/4 mile times
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Customizable Tuning Maps:
- Preloaded with custom S68 M5 JB4 software
- Includes up to 8 maps for various fuel and modification levels
- Ethanol (E85) compatible tuning maps
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Boost Control & Performance Fine-Tuning:
- Adjust boost by gear in 1st, 2nd, and 3rd via the JB4 app
- User-adjustable 1st and 2nd gear boost limiting
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Real-Time Data Monitoring:
- View and record up to 40 gauges and engine parameters
- Compatible with JB4 Mobile for logging, tuning changes, and updates
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Wireless Connectivity:
- Connects via Bluetooth 4.0 to your smartphone (iOS/Android) or Windows laptop
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Advanced Diagnostics:
- Read and delete fault codes
- Built-in advanced CANbus-based diagnostic tools
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Easy Installation & Removability:
- Quick plug & play installation
- No splicing or cutting of factory wires
- Completely removable without leaving a trace, making it resellable
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Compatibility:
- Compatible with all driving modes
- Fuel economy remains unchanged during normal driving
- Requires 91 octane or better for optimal performance
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Durable & Reliable:
- Rugged billet aluminum enclosure for protection
- Made in the USA with a 5-year warranty
Why Choose the JB4 Tuner for Your S68 G90 BMW M5?
The JB4 tuner offers unparalleled performance and convenience for your S68-powered G90 BMW M5. It provides far more than your average performance chip, delivering enhanced power, smoother performance, and safer tuning adjustments through innovative features like CANbus OBDII integration and Bluetooth connectivity. The JB4 is the ultimate plug-and-play tune for your vehicle, offering flexibility, ease of use, and exceptional power gains.
Vehicle Fitment:
- 2025+ BMW S68 G90 M5
- 2025+ BMW S68 G99 M5 Touring
How the JB4 Works:
The JB4 tuner is a plug-and-play tuning device for turbocharged vehicles, installed between your car’s sensors and its DME/ECU (engine control unit). By manipulating key parameters such as fuel and spark timing, the JB4 delivers a more responsive and powerful driving experience. With advanced features like CANbus integration, fuel control, boost management, and Bluetooth support, the JB4 stands out as the go-to solution for S68 tuning. It also allows easy updates, performance tuning, and customization through JB4 Mobile.
Additionally, the JB4 is not VIN-locked, allowing you to easily remove it and transfer it to another vehicle or sell it at a later time. BMS frequently releases free updates and new features to keep your performance up-to-date.
Additional Resources:
For the latest S68 performance results, tuning updates, and map guides, visit:
JB4 for S68 G90 BMW M5 Tuning Discussion
What’s Included:
- JB4 Tuner
- JB4 Mobile App Compatibility
- Billet Aluminum Enclosure
- 5-Year Warranty
By purchasing this item, you acknowledge that this item is ineligible for a refund, return, or exchange. Please view our Return Policy for more information.
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$19.99 | $24.99
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