S58 JB4 BETA for 2020+ BMW X3M/X4M

  • $ 799.00
Shipping calculated at checkout.

SKU: JB4_S58 + Long OBDII cable

Gains are 60whp/80wtq on pump gas and up to 100whp/120wtq on higher octane or E85 mixtures.

The ultimate tune for your S58 powered vehicle, the JB4 allows you to go from factory stock to full race, and everywhere in between, with the push of a button on your steering wheel. The JB4 installs and removes easily and includes many unique features not found in any other tune including user adjustable 1st and 2nd gear boost limiting, map switching in dash, electronic wastegate control, ethanol fuel support, and built in advanced CANbus based diagnostic tools. Installation is completely removable with no splicing or cutting of factory wires.

For the latest performance results, updates, firmware, and map guide be sure to visit N54tech.com.

Wirelessly connect the JB4 to your Bluetooth 4.0 compatible iOS and Android device via the JB4 Mobile connect kit, or to your Windows laptop with the BMS data cable. Both options allow you to record and analyze vehicle and tuning data, change JB4 performance maps, and update JB4 firmware as we release free newer versions with updates, more powerful maps, and new features under development. Separate JB4 Mobile app purchase also required.

 

JB4 Tuner for S55 BMW M3 M4 M2 competition

JB4 FEATURES AND BENEFITS

• Gains are 60whp/80wtq on pump gas and up to 100whp/100wtq on higher octane or E85 mixtures.
• Improves 0-60 times and 1/4 mile times
• The JB4 offers a lot more performance, functionality, and safety than your average performance chip
• Quick Plug & Play Installation
• Includes the rugged JB4 billet aluminum enclosure for protection
• 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
• Compatible with JB4 Mobile for smartphone logging, tuning changes, and adjustment
• 91 octane fuel or better required for performance gains
• Ethanol (E85) compatible tuning maps
• Able to read/delete fault codes
• Not VIN locked and can be removed without a trace and resold down the road
• Made in the USA
• Free USA Shipping
• 5 year warranty


S58 JB4 Applications

BMW X3M
• 2020+ S58 X3M
• 
2020+ S58 X3M Competition

BMW X4M
• 2020+ S58 X4M
• 
2020+ S58 X4M Competition

JB4 FAQ 

 S58 BMW engine tune vs b58 vs s55 tuner JB4 XM3 XM4 M3

DYNO
X4M X3M BMW JB4 DYNO

BMW X4M X3m Tuner JB4 Burger Motorsports Tuning BMS Aftermarket Parts

DRAGY TIMES

X4M dragy times  0 - 60 MPH JB4 tuner Burger Motorsports

BMW X4m S58 1/4 mile time JB4 tuned vs Sock

INSTALL GUIDE & DOWNLOAD JB4 APP