BMW B38/B46/B48/B58 JB4 Tuner

Regular price: $529.00
Sale price: $529.00
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POWER GAINS OF UP TO 100HP WITHOUT THE RISKS OF FLASHING!

If shipping to a California address, please select CARB compliant variation

The JB4 is the most fully equipped tuning system for your B58 and B48 vehicle currently on the market. For a B58, bolt-on parts, higher octane, E85 mixtures, and larger turbos can increase power by up to 80 horsepower to the wheels (100 horsepower crank) and up to 40 horsepower to the wheels (55 horsepower crank), respectively.

The JB4 includes many features not found with any other tune and comes with an easy plug-and-play installation harness for easy installation and removal. In-dash gauge displays for boost are an option, as are boost limiting by gear for better traction in lower gears, progressive water/methanol support, built-in data logging, built-in code reading, an optional direct EWG control to prevent throttle closure with exhaust modifications, exhaust flapper control, and many other features.

JB4 Map Guide:

Map0: Stock tuning, fully disable JB4
Map1: 3psi over stock added (91 octane)
Map2: 4psi over stock added (91-93 octane)
Map3: 6psi over stock added (93+ octane)
Map4: Absolute target map with peak target of 20psi (93+ and/or 30% E85, EWG connector suggested)
Map5: Absolute target map with peak target of 22psi (30% E85+ fuel, EWG connector suggested)
Map6: Custom tuning map -- see details on n54tech JB4 page
Map7: Progressive WMI map with tuning a function of meth flow and user defined boost additive.
Map8: VALET / Low Boost Map

We have not yet added the JB4 commands to allow in-dash control for 2018+ G chassis vehicles with the digital dash layout, but we will do so via a free firmware update once those are created. For any map or setting changes until then, a JB4 mobile adapter or BMS data cable is needed.

JB4 FEATURES AND BENEFITS

5-year warranty
Quick Plug & Play Installation
Compatible with JB4 Mobile for logging, adjustment, and tuning changes
Ethanol (E85) compatible tuning maps
Able to read/delete fault codes
Runs as smoothly as stock
Compatible with all driving modes
Power gains of up to 50 horsepower (hp) to the wheels
Improves 0-60 times and 1/4-mile times
Preloaded with custom BMW tuning software
Preloaded with 8 maps for various fuel and modification levels
Fuel economy unchanged during normal driving
Outperforms traditional performance chips in terms of both functionality and safety and offers increased performance overall
Includes rugged JB4 billet aluminum enclosure
Not VIN locked
It can be removed without a trace
CANbus OBDII integration providing unrivaled tuning performance and features
Improved performance over non-integrated chip tunes
91 octane fuel required for performance gains

If your BMW has a B38/B46/B48/B58 engine and you don't see your exact model on the list below please email us.

APPLICATIONS

Note: If your BMW has a B38/B46/B48/B58 engine and you don't see your exact model on the list below please email us.

BMW 1 Series
• 2021+ F40 B48 128ti
• 2019+ F40 B48 M135i
• 2019+ F40 B38 M118i
• 2015+ F20 F21 B58 M140i
• 2016+ F20 F21 B48 120i, 125i
• 2015+ F20 F21 B38 116i
• 2015+ F20 F21 B38 118i

BMW 2 Series
• 2016+ F22 F23 B58 M240i/iX
• 2017+ F22 F23 B48 230i/iX
• 2017+ F22 F23 B48 225i/iX
• 2017+ F22 F23 B46 220i/iX
• 2015+ F22 F23 B38 218i
• 2015+ F45 F46 B38 216i Active tourer and GT
• 2014+ F45 F46 B38 218i, 220i Active tourer and GT
• 2019+ F44 M235i/iX

BMW 3 Series
• 2020+ G20 G21 B58 M340i/M340iX
• 2019+ G20 G21 B46 B48 318i/320i/320Li/320e/330i/330iX/330e/320Li
• 2016-2019 F30 F31 F34 B58 340i/340iX
• 2016-2018 F30 F31 F34 B48 330i/330iX/330e
• 2016-2018 F30 F31 B48 325i/325iX
• 2016-2018 F30 F31 B46 320i/320iX
• 2016-2018 F30 F31 B46 318i/318iX

BMW 4 Series
• 2021+ G22 G23 G26 B58 440i/440iX/Gran Coupe
• 2021+ G22 G23 G26 B48 420i/430i/430iX/Gran Coupe
• 2016-2020 F32 F33 F36 B58 440i/440iX/Gran Coupe
• 2016-2020 F32 F33 F36 B48 430i/430iX/Gran Coupe
• 2016-2020 F32 F33 F36 B48 425i/425iX
• 2016-2020 F32 F33 F36 B46 420i/420iX
• 2016-2020 F32 F33 F36 B38 418i

BMW 5 Series
• 2017+ G30 G32 B58 540i/540iX
• 2017+ G30 G32 B46 B48 530i/530iX/530e
• 2021+ G30 545e

BMW 6 Series
• 2018+ G32 G33 B48/B58 630i/640i/640iX

BMW 7 Series
• 2016+ G11 G12 B58 740i/740iX

BMW 8 Series
• 2019+ G14 G15 G16 B58 840i/840iX/Gran Coupe

BMW X Series
• 2016+ B46/B48 X1
• 2018+ B46/B48 X2
• 2018+ G01 B48/B58 X3 2.0i/3.0i/M40i including xDrive and sDrive
• 2019+ G02 B48/B58 X4 2.0i/3.0i/M40i including xDrive and sDrive
• 2019+ G05 B58 X5 40i/40iX
• 2021+ G05 X5 45e
• 2019+ G06 X6 40iX
• 2019+ G07 B58 X7 40i