BMS JB4-B38-B46-B48 Tuner Module JB4 for BMW Engine B38 / B46 / B48

Description BMS JB4-B38-B46-B48 Tuner Module JB4 for BMW Engine B38 / B46 / B48

The JB4 is a plug and play tuner that plugs into easy to access sensors in the engine bay and works with your factory ECU tuning to remap your boost, timing, and fueling for optimal performance and reduced turbo lag. It features a 64mhz processor allowing sensors to be sampled 800 times per second using dedicated 10-bit digital to analog converters, ensuring smooth and powerful performance.

Unlike other tuning systems, the JB4 includes a fully programmable CANbus system, upgradable firmware, and data logging capability. CANbus allows the JB4 to take into account pedal input, throttle position, gear, engine speed, air/fuel ratio, fuel trims, ignition advance, knock, and many other factors and incorporate those into the performance mapping. It can also read/delete fault codes, and includes unique safety features such as keeping boost pressure low until oil and water is up to temperature to provide proper engine and turbo lucubration and drop to a low boost map if the engine starts to overheat, run lean, excessively knock, or over boost.

The JB4 offers a lot more performance, functionality, and safety than your average performance chip.

The default JB4 map 1 runs 4psi over stock peak, and tuned maps, including stock and valet mode, can be selected on the fly using a BMS diagnostics cable or JB4 mobile smartphone adapter.

Installation is very discrete, and it quickly removes without a trace when needed. Includes maps for 91 octane, 93 octane, and E85 (ethanol fuel) mixtures. Fuel economy during normal driving is unchanged. Compatible with all driving modes. Made in USA. 5 year warranty.

• Improves 0-60 times and 1/4 mile times
• Preloaded with custom JB4 tuning software and up to 8 maps for various fuel and modification levels
• Ethanol (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
• Exhaust flap operation can be controlled in most JB4 applications
• 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-and-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

Vehicle Fitment

• 2019-2024 F40 M135i
• 2020+ F40 B48 BMW 128ti
• 2019-2019 F40 B38 BMW 118i
• 2016-2019 F20/F21 B48 BMW 120i, 125i
• 2015-2019 F20/F21 B38 BMW 116i, 118i
• 2022+ G42 B48 BMW 220i, 230i
• 2017-2021 F22 F23 B48 BMW 230i including xDrive
• 2017-2021 F22 F23 B48 BMW 225i including xDrive
• 2017-2021 F22 F23 B46 BMW 220i including xDrive
• 2015-2021 F22 F23 B38 BMW 218i
• 2015-2021 F45 F46 B38 BMW 216i Active tourer and GT
• 2014-2020 F45 F46 B38 BMW 218i, 220i Active tourer and GT
• 2019+ F44 B48 BMW M235i Gran Coupé including xDrive
• 2019+ G20 G21 B46 B48 BMW 318i, 320i, 320Li, 320e, 330i, 330e, 320Li including xDrive
• 2016-2018 F30 B48 BMW 330i, 330e including xDrive
• 2016-2018 F30 B48 BMW 325i including xDrive
• 2016-2018 F30 B46 BMW 320i including xDrive
• 2016-2018 F30 B46 BMW 318i including xDrive
• 2021+ G22 G23 G26 B48 BMW 420i, 430i including Gran Coupe and xDrive
• 2016-2020 F32 F33 F36 B48 BMW 430i including Gran Coupe and xDrive
• 2016-2020 F32 F33 F36 B48 BMW 425i including xDrive
• 2016-2020 F32 F33 F36 B46 BMW 420i including xDrive
• 2016-2020 F32 F33 F36 B38 BMW 418i
• 2017-2023 G30 B46 BMW B48 530i 530e including xDrive
• 2021-2023 G30 BMW 545e
• 2018+ G32 G33 B48 BMW 630i including xDrive
• 2016-2022 G11 G12 B48 BMW 730i including xDrive
• 2016+ F48 B46 B48 BMW X1 28i including xDrive
• 2018+ F47 B46 B48 BMW X2 28i including xDrive
• 2018+ G01 B48 BMW X3 2.0i, X3 3.0i including xDrive
• 2019+ G02 B48 BMW X4 2.0i, X4 3.0i including xDrive
• 2019+ G05 B48 BMW X5 30i including xDrive
• 2019+ G29 B46 B48 BMW Z4 30i and Z4 20i