BMS JB4 for BMW GEN3 B48/B58

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$699.00

Part# BMS-B48-B58-GEN3-JB4

*California residents are subject to additional shipping fees that will be applied at checkout.

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Power gains of up to 130WHP on a stock vehicle without the risks of flashing!

The JB4 is the most advanced and highly featured tuning system available for your B48/B58 GEN3 powered vehicle. Power gains are up to 100whp to the wheels (125hp crank) on a completely stock car on 93 octane, and even higher with ethanol fuel mixed in!

This new JB4 BMW tuner is specifically designed for the latest Gen 3 B48/B58 variant and is capable of processing the new ultra fast SENT digital sensor signals in real time with zero latency. The JB4 features a simple plug & play installation harness for easy installation & removal and includes many features not found with any other tune. Including on the fly in-app map switching between factory and various performance maps, boost limiting by gear for improved traction in lower gears, progressive water/methanol support, built-in data logging, built-in code reading, and much more. Other more expensive tuners may claim to equal the JB4's technology but upon closer examination lack most if not all of the JB4's features.

Remember the JB4 does not require any additional modifications or previous stages. Simply install the JB4 as your first and only modification and enjoy an entirely new fast and smooth racing experience. The JB4 also does not require any user setup or customization, but for those who are interested in logging, adding new features as we post them, etc, we suggest the Bluetooth mobile phone adapter.

Wirelessly Connect to your JB4: Our all-new JB4 PRO smartphone connection is included to wirelessly connect the JB4 tuner to your Bluetooth 4.0 compatible iOS or Android device. This option allows 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. 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.

JB4 Power Gains, Features, & Benefits

  • Power gains of up to 130hp to the wheels on a stock vehicle
  • Improves 0-60 and quarter mile times.
  • Includes multiple tuning maps for different fuel types.
  • Quick plug and play installation.
  • Supports E85 ethanol blends.
  • Reads and deletes fault codes.
  • Displays and logs up to 40 engine parameters.
  • Boost by gear control for improved traction.
  • Controls exhaust flap operation on supported vehicles.
  • Compatible with the free JB4PRO app.
  • Offers better performance and safety than basic chip tunes.
  • Full CANbus integration.
  • Runs as smoothly as stock.
  • Compatible with all driving modes.
  • No impact on fuel economy during normal driving.
  • Requires 91 octane or better for performance gains.
  • Not VIN locked and fully removable.
  • Includes billet aluminum enclosure.
  • Designed and assembled in the USA.
  • 5-year warranty.

Vehicle Fitment (GEN 3 B48/B58)

⚠️This only fits the exact vehicles below. Does not plug into previous years B48/B58 engines due to different connectors on the newer B48/B58 engines.

BMW 2 Series

  • 2023+ F44 B48 GEN3 BMW 228i xDrive Gran Coupe

BMW 3 Series

  • 2025+ G20 G21 B58 GEN3 BMW M340i including xDrive
  • 2025+ G20 G21 B48 GEN3 BMW 330i 330e 320i including xDrive

BMW 4 Series

  • 2025+ G22 G23 G26 B58 GEN3 BMW M440i including Gran Coupe and xDrive
  • 2025+ G22 G23 G26 B48 420i, 430i including Gran Coupe and xDrive

BMW 5 Series

  • 2024+ G60 G61 B58 GEN3 BMW 540i including xDrive
  • 2024+ G60 G61 B48 GEN3 BMW 530i, 530e including xDrive

BMW 7 Series

  • 2023+ B58 GEN3 G70 BMW 740i

X Series

  • 2023+ U11 U12 B48 GEN3 BMW X1 28i and xDrive28i
  • 2024+ U10 B48 GEN3 BMW X2 xDrive28i and M35i xDrive
  • 2025+ G45 B58 GEN3 X3 M50 xDrive
  • 2024+ G05 B58 GEN3 BMW X5 M40i and xDrive40i
  • 2024+ G06 B58 GEN3 X6 xDrive40i
  • 2022+ G07 B58 GEN3 BMW X7 xDrive40i

 




    ⚠️CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov


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