BMS Group 4: JB4 VW Performance Tuner

JB4 Group 4: VW Performance Tuner

The JB4 is a true user adjustable plug and play solution for Gen3 Jetta GLI and Turbo Beetle. Power Gains starting at 55bhp and 60ft-lb with 91 octane/95Ron with + 4.0 psi boost over stock on the default setting. Up to 80bhp and 80ft-lb with bolt-on modifications, higher octane, and boost adjustment with the optional wireless JB4PRO Bluetooth connection.

The JB4 features CANbus connectivity for more advanced tuning, direct AFR control, advanced safety systems for boost, air/fuel ratio, fuel trims, and engine knock, boost mapping by gear for improved traction, integrated water/meth control, and much more.

The unit can be used with our wireless JB4PRO Bluetooth connection providing for full in-car engine parameter display, map switching, and adjustment The JB4 can also be stacked over flash tuning allowing for fine-tuning as well as water/methanol control with safety measures in place and full logging.

Adjustment procedure, software download, and further information can be read here:

The JB1 and JB4 are compatible with all the below models and have been tested in all markets and on all year models.

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JB4 Features & Benefits

• 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

Volkswagen
• 2013.5-2018 VW Jetta MK6 GLI Gen 3
• 2013-2020 VW Beetle 2.0T Gen 3
• 2014-2020 VW Beetle 1.8T
• 2014-2019 VW Jetta 1.8T Gen 3 170hp
• 2014-2019 VW Passat 1.8T Gen 3 170hp

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 and is sold in over 67 countries worldwide.

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.

DYNO RESULTS

Dyno measured on the wheels on 91 and 93AKI