B38/B46/B48/B58 JB Plus Quick Install Tuner

  • $239.00
Shipping calculated at checkout.

SKU: B46/B48/B58 JB+-1

Plug in up to 40 extra wheel horsepower in seconds!

Finally our popular and well-proven JB Plus quick install tuner is available for B46, B48, and B58 applications! Boost is user adjustable up to 4.5psi over stock providing gains up to 30 wheel horsepower and 40 wheel torque on the B48 motor and up to 40 wheel horsepower and 50 wheel torque on the B58 motor. Timing and fueling remain managed seamlessly by the DME, preserving all factory safety systems.

While the JB4 is the ultimate tuning tool, the JB Plus 
(JB+) is a quick and simple way to add a few HP with minimal cost and minimal installation effort. Something that anyone can buy, install in under a minute, and really feel from the driver's seat.

Fuel economy during normal driving is unchanged. Automatically detects the engine type upon installation, allowing the same unit to be used for any B48 B58 F series application!

For those who want to start with the JB Plus and upgrade to the higher power, more advanced JB4 tune, we offer a 100% trade-up credit. To qualify, simply purchase the JB4 system from our website directly, and then after receipt, mail back the JB Plus along with its purchase receipt from BMS or any authorized reseller, and we'll issue a $239.00 refund against your JB4 purchase. The offer is valid for up to one year after purchasing the JB Plus. Made in the USA. 5-Year Warranty.

B58_JB_PLUS is CARB Approved Under Executive Order (EO) No.D-744-4 for all 2016-2018 BMW 230i, 330i, 430i, 530i, 340i, 440i, 740i, M240i, and X1 applications.

Vehicle Fitment

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
• 2020+ F40 B48 128ti
• 2019+ F40 B48 M135i
• 2019-2019 F40 B38 118i
• 2015-2019 F20/F21 B58 M140i
• 2016-2019 F20/F21 B48 120i, 125i
• 2015-2019 F20/F21 B38 116i, 118i

BMW 2 Series
• 2022+ G42 B58 M240i including xDrive
• 2022+ G42 B48 220i, 230i
• 2016-2021 F22 F23 B58 M240i including xDrive
• 2017-2021 F22 F23 B48 230i including xDrive
• 2017-2021 F22 F23 B48 225i including xDrive
• 2017-2021 F22 F23 B46 220i including xDrive
• 2015-2021 F22 F23 B38 218i
• 2015-2021 F45 F46 B38 216i Active tourer and GT
• 2014-2020 F45 F46 B38 218i, 220i Active tourer and GT
• 2019+ F44 B48 M235i Gran Coupé including xDrive

BMW 3 Series
• 2020+
G20 G21 B58 M340i including xDrive
• 2019+ G20 G21 B46 B48 318i, 320i, 320Li, 320e, 330i, 330e, 320Li including xDrive
• 2016-2018 F30 B58 340i including xDrive
• 2016-2018 F30 B48 330i, 330e including xDrive
• 2016-2018 F30 B48 325i including xDrive
• 2016-2018 F30 B46 320i including xDrive
• 2016-2018 F30 B46 318i including xDrive

BMW 4 Series
• 2021+ G22 G23 G26 B58 M440i including Gran Coupe and xDrive 
• 2021+ G22 G23 G26 B48 420i, 430i including Gran Coupe and xDrive 
• 2016-2020 F32 F33 F36 B58 440i including Gran Coupe and xDrive 
• 2016-2020 F32 F33 F36 B48 430i including Gran Coupe and xDrive 
• 2016-2020 F32 F33 F36 B48 425i including xDrive 
• 2016-2020 F32 F33 F36 B46 420i including xDrive
• 2016-2020 F32 F33 F36 B38 418i

BMW 5 Series
• 2017+ G30 B58 540i including xDrive
• 2017+ G30 B46 B48 530i 530e including xDrive
• 2021+ G30 545e

BMW 6 Series
• 2018+ G32 G33 B48 B58 630i 640i including xDrive

BMW 7 Series
• 2016-2022 G11 G12 B58 740i including xDrive

• 2016-2022 G11 G12 730i including xDrive

BMW 8 Series
• 2020+ G15 G14 G16 B58 840i including Gran Coupe and xDrive

BMW X Series
• 2016+ B46 B48 
• 2018+ B46 B48 X2
• 2018+ G01 B48 B58 X3 2.0i, X3 3.0i, X3 M40i including xDrive
• 2019+ G02 B48 B58 X4 2.0i, X4 3.0i, X4 M40i including xDrive
• 2019-2022 G05 B58 X5 40i including xDrive
• 2021-2022 G05 X5 45e including xDrive
• 2020+ G06 B58 X6 40i xDrive
• 2019-2022 G07 B58 X7 40i including xDrive

• 2019+ BMW G29 B58 Z4 M40i
• 2019+ BMW G29 B46 B48 Z4 30i and Z4 20i

MINI B38/B46/B48
• 2014+ F57 MINI Cooper S 
• 2015+ F57 MINI Cooper JCW GP 
• 2014+ F55/F56 MINI Cooper S 
• 2015+ F55/F56 MINI Cooper JCW 
• 2018+ F55/F56 MINI Cooper One

• 2017+ F60 MINI Countryman S including ALL4
• 2018+ F60 MINI Countryman JCW ALL4

• 2016+ F54 MINI Clubman S
• 2017+ F54 MINI Clubman S ALL4
• 2017+ F54 MINI Clubman JCW ALL4

If you don't see your B38/B46/B48/B58 powered vehicle or year listed here please email us. 


2016 BMW 340i, 91 octane
Stock vs. JB Plus

2016 BMW 340i, 91 octane Stock vs. JB Plus