Description
The Burger Motorsports JB4 is a high-performance plug-and-play tuning module engineered specifically for BMW N20 and N26 turbocharged 2.0L engines. Designed to deliver significant power gains without permanently modifying the factory ECU, the JB4 transforms throttle response, boost control, and overall drivability while maintaining OEM-level safety systems.
Unlike traditional ECU flash tunes, the JB4 operates as an advanced external control module that interfaces with factory sensors and CANbus data in real time. This allows it to safely optimize boost pressure, fuel trims, and ignition timing for substantial performance improvements while remaining fully removable and non-invasive.
Significant Power Gains & Driving Performance
The JB4 delivers dramatic performance improvements depending on vehicle condition and modifications:
- Up to +50 wheel horsepower / +60 lb-ft torque on stock vehicles
- Up to +100 wheel horsepower / +120 lb-ft torque on modified setups
- Improved 0–60 acceleration and quarter-mile times
- Sharper throttle response and stronger mid-range torque
This makes it one of the most effective and widely used performance upgrades for the BMW N20 platform.
Advanced Features & Real-Time Control
The JB4 system includes a wide range of advanced tuning and monitoring capabilities, including:
- Multiple selectable performance maps for different fuel types
- Boost-by-gear traction control for improved grip
- E85 ethanol blend compatibility
- In-cabin map switching and on-the-fly tuning control
- Built-in diagnostic code reading and clearing
- Real-time monitoring of up to 40 engine parameters
- Exhaust flap control (supported models)
- Integrated boost gauge display
- Free firmware updates with ongoing feature expansion
Plug & Play Installation
The JB4 is designed for simple, reversible installation:
- Fully plug-and-play harness system
- Installs and removes in minutes
- No ECU flashing or permanent modification required
- No VIN locking — transferable between vehicles
- Compatible with factory driving modes
Because it does not overwrite the factory ECU, the vehicle retains all OEM safety systems and can return to stock at any time.
Smartphone Connectivity (JB4 PRO)
The included JB4 PRO Bluetooth module allows wireless control and monitoring via iOS or Android:
- Real-time data logging and performance tracking
- Map switching via smartphone app
- Firmware updates and tuning enhancements
- Advanced diagnostic and performance analysis tools
- Compact internal installation within the JB4 enclosure
Key Features & Benefits
- Plug & play performance tuning solution
- Substantial horsepower and torque gains
- Retains factory ECU and safety systems
- Supports multiple fuel types including E85 blends
- Advanced boost, fuel, and timing control strategies
- Fully removable and reusable on other vehicles
- Designed and assembled in the USA
- 5-year manufacturer warranty
Vehicle Applications
- 2012–2016 BMW 3 Series (F30) – 320i / 328i (N20/N26)
- 2014–2016 BMW 4 Series (F32) – 420i / 428i
- 2014–2016 BMW 2 Series (F22) – 220i / 228i
- 2011–2016 BMW 5 Series (F10) – 520i / 528i
- 2011–2017 BMW X3 (F25) – xDrive20i / xDrive28i
- 2013–2016 BMW Z4 (E89) – 28i
- 2013–2015 BMW X1 (E84) – 28i
Installation
- Plug-and-play harness installation
- No permanent ECU modification required
- Reversible and removable at any time
- Professional installation optional but not required
