Power gains of up to 100hp and 140tq to the wheels on a stock vehicle

The JB4 performance Tuner includes CANbus, full data logging, multiple performance maps, user-adjustable fuel control, boost by gear settings, WMI support, JB4 Mobile wireless compatibility, and much more. Compatible both as stand-alone tuning systems or in conjunction with performance flash maps where logging, safety, and fine-tuning tools are desirable.

No ECU flash needed and compatible with locked 🔒 ECUs

Wirelessly Connect to your JB4: Grab our all-new JB4 PRO smartphone connection 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. For more info on how to use the JB4PRO free app click here.

• Optional: For Extra Ordinary Performance with JB4 We also recommend Our N63 Downpipe

N63 JB4 Features & Benefits

• Power gains of up to 100hp and 140tq to the wheels on a stock vehicle

• Improves 0-60 times and 1/4 mile times
• Preloaded with custom JB4 BMW 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 different 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

Fitment

BMW 5 Series
• 2011 F10/F11/F07 550i sDrive/xDrive/GT (F Chassis N63 TYPE_A)
• 2012-2013 F10/F11/F07 550i sDrive/xDrive/GT (Most are F Chassis N63 TYPE_B but some are F Chassis N63 TYPE_A, check sensor before ordering using sensor reference photo)
• 2014-2016 F10/F11/F07 550i sDrive/xDrive/GT (F Chassis N63TU)
• 2017+ G Series 550i/M550i G30 models (G Chassis N63R)

BMW 6 Series
• 2012-2019 F12/F13 650i sDrive/xDrive (F Chassis N63TU)
• 2013-2019 F06 650i Gran Coupe (F Chassis N63TU)

BMW 7 Series
• 2009-2011 F01/F02 750i/750Li sDrive/xDrive (F Chassis N63 TYPE_A)
• 2012-2013 F01/F02 750i/750Li sDrive/xDrive (Most are F Chassis N63 TYPE_B but some are F Chassis N63 TYPE_A, check sensor before ordering using sensor reference photo)
• 2014-2016 F10/F11/F07 550i sDrive/xDrive/GT (F Chassis N63TU)
• 2017+ G12 750i/750Li sDrive/xDrive (G chassis N63R)

BMW 8 Series
• 2018+ G15/G14/G16 M850i xDrive Coupe and Convertible (G Chassis N63R)

BMW X Series
• 2014-2018 F15 X5 50i sDrive/xDrive (F Chassis N63TU)
• 2015-2019 F16 X6 50i sDrive/xDrive (F Chassis N63TU)
• 2009-2011 E70 X5 50i sDrive/xDrive (N63 TYPE_A)
• 2012-2013 E70 X5 50i sDrive/xDrive (Most are F Chassis N63 TYPE_B but some are N63 TYPE_A, check sensor before ordering using sensor reference photo)
• 2007-2011 E71 X6 50i sDrive/xDrive (E70/E71 N63 TYPE_A)
• 20012-2013 E71 X6 50i sDrive/xDrive (Most are F Chassis N63 TYPE_B but some are N63 TYPE_A, check sensor before ordering using sensor reference photo)
• 2019+ G05 X5 50i/xDrive and M50i/xDrive (G Chassis N63R)
• 2020+ G06 X6 50i/xDrive and M60i/xDrive (G Chassis N63R)
• 2019+ G07 X7 50i/xDrive, M50i/xDrive, and Alpina XB7 (G Chassis N63R)

What is a JB4?

The JB4 is a plug & play tune available for turbocharged vehicles. The JB4 tuner installs between your car's sensors and its DME/ECU (computer) and manipulates vehicle performance through these connections making your vehicle much faster. While it's not the only tuning system that operates this way the JB4 separates itself from the competition with much more advanced connection points and processing including CANbus, fuel & spark control, Bluetooth to your smartphone, and a variety of innovative and advanced features not possible with any other system. BMS regularly publishes free mapping and firmware updates adding performance and features as ongoing development allows. In addition, the JB4 system is not VIN-locked to your vehicle and can quickly be removed and swapped between cars or resold at a later time. Often imitated but never duplicated the JB4 has been the gold standard in plug and play turbocharged performance tuning for over a decade.

Is the JB4 a real tune?

Yes the JB4 is a real tune. By tapping into specific sensors and CANbus for real time vehicle data the JB4 is able to alter your boost, timing, AFR, and/or fuel trims, to a similar degree an ECU reflash would, but without the vehicle ever knowing its been tuned. The result is safe, smooth, and significant power and torque gains while retaining your factory safety systems and without having to unlock/flag your ECU.

Download JB4 INSTALL GUIDE

• Download Install guide F Series N63/N63TU
• Download Install guide G Series N63R

DYNO RESULTS

2021 BMW M550i with JB4

(N63) 2011 550 with JB4, 30% E85

(N63TU) 2016 550 with JB4, 30% E85