Description
The Burger Tuning JB4 for BMW B38, B46, and B48 engines is the ultimate plug-and-play performance upgrade, offering massive power gains without the risks of an ECU flash. On a completely stock vehicle, the JB4 delivers up to 100 horsepower at the wheels—with even higher potential when combined with bolt-on mods, ethanol blends, or larger turbos.
No ECU flashing is required, making the JB4 fully compatible with locked ECUs. The installation is quick and completely reversible, with a simple plug-and-play harness. Once installed, you’ll enjoy features no basic tuner can match, including on-the-fly in-dash map switching, gear-specific boost control, progressive water/methanol injection support, integrated diagnostics, boost display options, and EWG control to prevent throttle closure with exhaust mods.
Key Features & Benefits
- Gains of up to 100whp on a stock BMW B38/B46/B48 engine
- Eight preloaded maps for various fuel grades, modifications, and E85 blends
- Plug-and-play installation—no cutting or splicing
- CANbus OBDII integration for unmatched tuning control
- E85 ethanol-compatible tuning maps
- Boost-by-gear control for optimized traction
- Exhaust flap control in most applications
- Real-time monitoring of up to 40 parameters via JB4 app
- Built-in fault code reading and clearing
- Progressive water/methanol injection (WMI) control
- Smooth OEM-like drivability in all driving modes
- No VIN lock—transfer or resell anytime
- Rugged billet aluminum JB4 enclosure included
- Designed and assembled in the USA
- 5-year warranty
JB4 Map Guide
- Map 0: Stock tuning, JB4 fully disabled
- Map 1: +3psi over stock (91 octane)
- Map 2: +4psi over stock (91–93 octane)
- Map 3: +6psi over stock (93+ octane)
- Map 4: 20psi target (93+ or 30% E85, EWG suggested)
- Map 5: 22psi target (30%+ E85, EWG suggested)
- Map 6: Custom user-defined tuning
- Map 7: WMI progressive tuning
- Map 8: Valet / low-boost mode
Vehicle Fitment
BMW 1 Series
- 2019–2024 F40 M135i
- 2020+ F40 B48 128ti
- 2019 F40 B38 118i
- 2016–2019 F20/F21 B48 120i, 125i
- 2015–2019 F20/F21 B38 116i, 118i
BMW 2 Series
- 2022+ G42 B48 220i, 230i
- 2017–2021 F22/F23 B48 230i, 225i (incl. xDrive)
- 2017–2021 F22/F23 B46 220i (incl. xDrive)
- 2015–2021 F22/F23 B38 218i
- 2015–2021 F45/F46 B38 216i Active Tourer & GT
- 2014–2020 F45/F46 B38 218i, 220i Active Tourer & GT
- 2019+ F44 B48 M235i Gran Coupé (incl. xDrive)
BMW 3 Series
- 2019+ G20/G21 B46/B48 318i, 320i, 320Li, 320e, 330i, 330e (incl. xDrive)
- 2016–2018 F30 B48 330i, 330e (incl. xDrive)
- 2016–2018 F30 B48 325i (incl. xDrive)
- 2016–2018 F30 B46 320i (incl. xDrive)
- 2016–2018 F30 B46 318i (incl. xDrive)
BMW 4 Series
- 2021+ G22/G23/G26 B48 420i, 430i (incl. GC and xDrive)
- 2016–2020 F32/F33/F36 B48 430i (incl. GC and xDrive)
- 2016–2020 F32/F33/F36 B48 425i (incl. xDrive)
- 2016–2020 F32/F33/F36 B46 420i (incl. xDrive)
- 2016–2020 F32/F33/F36 B38 418i
BMW 5 Series
- 2017–2023 G30 B46/B48 530i, 530e (incl. xDrive)
- 2021–2023 G30 545e
BMW 6 Series
-
2018+ G32/G33 B48 630i (incl. xDrive)
BMW 7 Series
-
2016–2022 G11/G12 B48 730i (incl. xDrive)
BMW X Series
- 2016+ F48 B46/B48 X1 28i (incl. xDrive)
- 2018+ F47 B46/B48 X2 28i (incl. xDrive)
- 2018+ G01 B48 X3 2.0i, X3 3.0i (incl. xDrive)
- 2019+ G02 B48 X4 2.0i, X4 3.0i (incl. xDrive)
- 2019+ G05 B48 X5 30i (incl. xDrive)
BMW Z4
-
2019+ G29 B46/B48 Z4 30i, Z4 20i
If you’d like, I can also give you a shorter, high-impact sales version for quick-read category pages while keeping this one for the detailed product page. That will help customers scanning multiple JB4 options decide instantly.
