JB4 Tuner

The S58 JB4 Tuner from Burger Motorsports is an advanced, plug-and-play performance tuning device designed for 2020 and newer BMW F97 X3M and F98 X4M models equipped with the S58 engine. This tuner installs easily by connecting between your car's sensors and its DME/ECU, allowing it to manipulate performance parameters safely and effectively. It offers a significant increase in speed and responsiveness. Key features of the JB4 include user-adjustable 1st and 2nd gear boost limiting for improved traction, smartphone integration via the free JB4PRO app for iOS and Android devices (allowing map changes, data logging, and firmware updates), electronic wastegate control, and support for ethanol fuel blends (E85). It also includes built-in advanced CANbus-based diagnostic tools for reading and deleting fault codes and displaying up to 40 engine parameters. This JB4 system offers substantial performance gains, with reported figures of 80 wheel horsepower and 100 wheel torque on pump gas, and up to 150 wheel horsepower and 175 wheel torque when using higher octane fuels or E85 mixtures. It also improves 0-60 times and quarter-mile performance. The tuner includes multiple maps for various fuel types and is compatible with all driving modes and factory over-the-air software updates. Optional accessories, such as a flex fuel/port injection harness and MAP sensor bypass extensions, are available for more advanced tuning setups. The JB4 Tuner is covered by a 5-year warranty and is designed and assembled in the USA. It is not VIN-locked and can be quickly removed and swapped between vehicles or resold later. The system runs as smoothly as stock during normal driving with no impact on fuel economy, but requires 91 octane or better for optimal performance gains.