Description
The Burger Tuning JB4 for BMW GEN3 B48/B58 engines offers up to 130 horsepower gains at the wheels on a completely stock vehicle without flashing the ECU or risking warranty issues. Specifically designed for the latest generation B48 and B58 engines, this JB4 tuner processes ultra-fast SENT digital sensor signals with zero latency for unmatched performance and smoothness.
The JB4 features a simple plug-and-play harness that installs easily with no splicing, making it the perfect first modification. It offers on-the-fly map switching via the JB4 app, boost limiting by gear for improved traction, progressive water/methanol injection support, built-in data logging, code reading, and much more.
With up to 8 custom tuning maps preloaded, including ethanol (E85) compatible options, this JB4 keeps your BMW running safely and efficiently in all driving modes while significantly improving 0-60 and 1/4 mile times.
Key Features & Benefits
- Up to 130whp gains on stock vehicles (125hp crank)
- Improves acceleration and quarter-mile performance
- Plug & play installation—no ECU flashing or splicing
- Processes ultra-fast SENT sensor signals with zero latency
- Boost limiting by gear for optimal traction launch control
- Supports progressive water/methanol injection
- View and record 40+ real-time engine parameters via JB4 app
- Read and clear fault codes
- Compatible with JB4 Mobile and JB4PRO Bluetooth adapters
- Ethanol (E85) compatible maps available
- CANbus OBDII integration for advanced tuning and safety features
- Runs smoothly like stock in all modes, no driveability issues
- Fuel economy unchanged in normal driving
- 91 octane fuel or higher required for max performance
- Not VIN locked—removable and transferable without trace
- Rugged billet aluminum enclosure for durability
- Made in the USA with a 5-year warranty
Vehicle Fitment (GEN3 B48/B58 Specific)
Note: This JB4 fits only the exact models listed below due to unique connectors on GEN3 engines. For earlier B48/B58 generations, see the previous JB4 versions.
BMW 2 Series
-
2023+ F44 B48 GEN3 228i xDrive Gran Coupe
BMW 3 Series
- 2025+ G20/G21 B58 GEN3 M340i (including xDrive)
- 2025+ G20/G21 B48 GEN3 330i, 330e, 320i (including xDrive)
BMW 4 Series
- 2025+ G22/G23/G26 B58 GEN3 M440i (including Gran Coupe and xDrive)
- 2025+ G22/G23/G26 B48 GEN3 420i, 430i (including Gran Coupe and xDrive)
BMW 5 Series
- 2024+ G60/G61 B58 GEN3 540i (including xDrive)
- 2024+ G60/G61 B48 GEN3 530i, 530e (including xDrive)
BMW 7 Series
-
2023+ G70 B58 GEN3 740i
X Series
- 2023+ U11/U12 B48 GEN3 X1 28i and xDrive28i
- 2025+ G45 B58 GEN3 X3 M50 xDrive
- 2024+ G05 B58 GEN3 X5 M40i and xDrive40i
- 2024+ G06 B58 GEN3 X6 xDrive40i
- 2022+ G07 B58 GEN3 X7 xDrive40i
What is the JB4?
The JB4 is a cutting-edge plug & play performance tuner for turbocharged vehicles that installs between your vehicle’s sensors and ECU. It manipulates boost, timing, and fueling to unlock hidden power while maintaining factory-like drivability. The JB4 features advanced CANbus integration, Bluetooth smartphone connectivity, and free firmware updates, making it the gold standard for BMW tuning worldwide.
