The JB4 is the most advanced and highly featured tuning system available for your B48/B58 GEN3 powered vehicle. Power gains are up to 100whp to the wheels (125hp crank) on a completely stock car on 93 octane, and even higher with ethanol fuel mixed in!
This new JB4 BMW tuner is specifically designed for the latest Gen 3 B48/B58 variant and is capable of processing the new ultra-fast SENT digital sensor signals in real time with zero latency. The JB4 features a simple plug & play installation harness for easy installation & removal, and includes many features not found with any other tune. Including on-the-fly in-app map switching between factory and various performance maps, boost limiting by gear for improved traction in lower gears, progressive water/methanol support, built-in data logging, built-in code reading, and much more. Other more expensive tuners may claim to equal the JB4's technology, but upon closer examination, lack most, if not all, of the JB4's features.
Remember, the JB4 does not require any additional modifications or previous stages. Simply install the JB4 as your first and only modification and enjoy an entirely new, fast, and smooth racing experience. The JB4 also does not require any user setup or customization, but for those who are interested in logging, adding new features as we post them, etc, we suggest the Bluetooth mobile phone adapter.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For models with the Gen3 B58 (B58N / B58TU2) and Gen3 B48 (B48N / B48P / B48TU2) engines only
The JB4 is the most advanced and highly featured tuning system available for your B48/B58 GEN3 powered vehicle. Power gains are up to 100whp to the wheels (125hp crank) on a completely stock car on 93 octane, and even higher with ethanol fuel mixed in!
This new JB4 BMW tuner is specifically designed for the latest Gen 3 B48/B58 variant and is capable of processing the new ultra-fast SENT digital sensor signals in real time with zero latency. The JB4 features a simple plug & play installation harness for easy installation & removal, and includes many features not found with any other tune. Including on-the-fly in-app map switching between factory and various performance maps, boost limiting by gear for improved traction in lower gears, progressive water/methanol support, built-in data logging, built-in code reading, and much more. Other more expensive tuners may claim to equal the JB4's technology, but upon closer examination, lack most, if not all, of the JB4's features.
Remember, the JB4 does not require any additional modifications or previous stages. Simply install the JB4 as your first and only modification and enjoy an entirely new, fast, and smooth racing experience. The JB4 also does not require any user setup or customization, but for those who are interested in logging, adding new features as we post them, etc, we suggest the Bluetooth mobile phone adapter.
JB4 Power Gains, Features, & Benefits
Power gains of up to 130hp to the wheels on a stock vehicle
Improves 0-60 times and 1/4 mile times
Preloaded with custom JB4 BMW tuning software and up to 8 maps for various fuel and modification levels
Ethanol mixture (E85) compatible tuning maps
Able to read/delete fault codes
View and record up to 40 different gauges/engine parameters in real time with the JB4 app.
Boost by gear in 1st, 2nd, and 3rd can be controlled via the JB4 app for a perfect launch
Compatible with JB4 Mobile for smartphone logging, tuning changes, and adjustment
The JB4 offers a lot more performance, functionality, and safety than your average performance chip
Quick Plug & Play Installation
CANbus OBDII integration offering unrivaled tuning features and performance
Improved performance over non-integrated chip tunes
Runs as smoothly as stock, this is how your vehicle should have come from the factory
Compatible with all driving modes
Fuel economy unchanged during normal driving
91 octane fuel or better required for performance gains
Not VIN locked and can be removed without a trace and resold down the road
Includes the rugged JB4 billet aluminum enclosure for protection
Made in the USA
5-year warranty
Not for sale or use in the state of California on any pollution-controlled vehicle as per the California Air Resources Board.
Prop 65 Warning
Product Q&A
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Fits These Cars
MAKE
MODEL
SUBMODEL
ENGINE
Special Fitment Notes
BMW
F44
228i
B48 2.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G05
X5 xDrive40i
B58 3.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G06
X6 xDrive40i
B58 3.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G07
X7 xDrive40i
B58 3.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G20
M340i
B58 3.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G20
M340i xDrive
B58 3.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G22
430i
B46 2.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G22
430i xDrive
B46 2.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G22
M440i
B58 3.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G22
M440i xDrive
B58 3.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G23
430i
B46 2.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G23
430i xDrive
B46 2.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G23
M440i
B58 3.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G23
M440i xDrive Convertible
B58 3.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G26
430i Gran Coupe
B46 2.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G26
430i xDrive Gran Coupe
B46 2.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G26
M440i
B58 3.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G26
M440i xDrive
B58 3.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G45
X3 M50 xDrive
B58 3.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G60
530i
B48 2.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G60
530i xDrive
B48 2.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G60
540i xDrive
B58 3.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G70
740i
B58 3.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
G70
740i xDrive
B58 3.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
BMW
U11
X1 xDrive28i
B48 2.0L
For models with the Gen3 engines only (B48N/B48P/B48TU2 & B58N/B58TU2)
*The above product applications have been written by Turner Motorsport. All
warranties, product application, fitment, and performance are the responsibility of Turner Motorsport.
For additional information see the terms of use.