N55 Power gains of up to 60hp and 60tq to the wheels on a stock vehicle

How about up to 60hp to the wheels (80hp crank) on a completely stock car or up to 100hp to the wheels (120hp crank) on a fully modified car? The JB4 features a simple plug & play installation harness for easy installation and includes many features not found on any other tune. Including on the fly in dash map switching between factory and various performance maps, optional in-dash gauge displays for boost and other critical engine parameters, progressive water/methanol support, ethanol fuels support, built-in code reading, and much more.

Remember the JB4 tuner for N55 engines 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, changing maps, etc, we suggest the JB4PRO adapter and free app!

Click here for the latest JB4 firmware, map guide, and details

How to tell if you need harness A or B

• Optional: For Extra Ordinary Performance with JB4 We also recommend Our N55 Downpipe

Performance Features

• Multiple Performance Maps: The JB4 offers up to 8 preloaded tuning maps to suit different fuel types and modification levels, with support for ethanol blends (E85).
• On-the-Fly Map Switching: Users can switch between factory and performance maps through in-dash controls without stopping.
• Boost Control: Fine-tuned control over boost in different gears for optimal launches and performance.
• Data Monitoring and Code Reading: Integrated OBDII CANbus data lets you read and delete fault codes, and the tuner offers real-time monitoring and logging of up to 40 engine parameters.
• Exhaust Control: Adjust the exhaust flap operation (applicable to most vehicles) for customizable sound and performance.

Ease of Use

• Plug & Play Installation: The JB4 installation is straightforward and requires no additional modifications. Simply plug it in and start enjoying enhanced performance.
• Bluetooth & Mobile Compatibility: Connect wirelessly via a Bluetooth 4.0 compatible device with the JB4 Mobile connect kit, or use the BMS data cable for a Windows laptop connection. This allows for map switching, data logging, firmware updates, and more.
• No VIN Locking: Unlike many other tunes, the JB4 can be easily removed without leaving a trace on the vehicle and resold if desired.
• Fuel Economy Maintenance: During normal driving, fuel economy remains unchanged.

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.

Fitment

The JB4 Tuner is compatible with various N55 BMW models, including:

BMW 1 Series
• 2011-2013 N55 BMW E82 E88 135i LHD

BMW 3 Series
• 2011 N55 BMW E90 E91 335i including xDrive
• 2011-2013 N55 BMW E92 E93 335i including xDrive

BMW X Series
• 2013-2015 N55 BMW E84 X1 35i xDrive
• 2011-2013 N55 BMW E70 X5 35i including xDrive
• 2011-2013 N55 BMW E71 X6 35i including xDrive

Additional Benefits

• 5-year warranty and free shipping within the USA.
• Customization options for advanced users through software updates and data logging capabilities.

In summary, the JB4 Tuner for N55-equipped BMWs offers a significant boost in performance while maintaining drivability, reliability, and flexibility through easy installation and use. It stands out due to its versatile tuning capabilities and robust feature set designed to cater to both everyday drivers and performance enthusiasts.

Click here for the latest JB4 firmware, map guide, and details

How to tell if you need harness A or B

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 the 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.

E70 X5 E71 X6 N55 JB4 Install

All others click below:

JB4 Tuner Install Video for E Chassis N55 BMW

DYNO RESULTS

JB4 Only

 JB4, Exhaust, E85 Fuel

JB4, Exhaust, Hybrid Turbo, E85 Fuel

Optional JB4 Phone Software

JB4 Optional Startup Gauge Sweep

JB4 Optional In Dash Boost Gauge / Shift Light Demo

JB4 135i 335i Steering Wheel Controls Demo Video