Description
The Burger Tuning JB4 Group 10 is a plug-and-play performance tuner for VW Jetta and Golf EA211 1.4L TSI engines, delivering significant horsepower and torque gains while maintaining factory-like smoothness and reliability.
Thanks to CANbus OBDII integration, the JB4 intelligently adjusts boost, timing, and fueling in real time based on engine conditions. It also incorporates advanced safety features, including reduced boost until proper oil/water temperature is reached, automatic low-boost fallback if the engine overheats or knocks, and overboost protection.
Preloaded with up to 8 performance maps, the JB4 supports pump gas, ethanol (E85) blends, race fuels, and more. Install takes just minutes, is completely reversible, and works with locked ECUs — no flash tuning required.
Features & Benefits
- More horsepower and torque for daily driving and track use
- Works with locked ECUs — no flash required
- Plug & Play install — no permanent modifications
- CANbus integration for real-time tuning adjustments
- Preloaded with 8 performance maps for various fuels and mods
- E85 ethanol compatible tuning maps
- Boost-by-gear control for traction management
- Built-in safety features for knock, overheating, and overboost
- Read and clear fault codes via JB4 app
- Compatible with JB4 Mobile by DMAC ($29) or JB4PRO (free) wireless adapters
- Smooth, OEM-like drivability in normal conditions
- Fuel economy unchanged during regular driving
- Fully reversible — not VIN-locked, transferable between vehicles
- Rugged billet aluminum JB4 enclosure
- Made in the USA with a 5-year warranty
Vehicle Fitment
Volkswagen
- 2018–2021 VW Jetta 1.4T TSI
- 2019–2022 VW Golf 1.4T TSI
What is a JB4?
The JB4 is a next-generation piggyback ECU tuner for turbocharged engines. It installs between factory sensors and the ECU to fine-tune boost, ignition, and fueling for safe, consistent power gains. Unlike simple “boost chips,” the JB4 leverages CANbus data for advanced features such as ethanol mapping, boost-by-gear, fault code reading, and data logging.
Free firmware updates and mapping refinements are provided by Burger Motorsports, ensuring your tune stays current and powerful for years to come.
