Group 7: JB4 SENT Tuner for Audi B9 S4/S5/SQ5/RS4/RS5

  • $599.00
Shipping calculated at checkout.

SKU: Audi S4 JB4 ***SENT***

True Plug and Play Tuning

Group 7: 
JB4 Tuner

The JB4 is an easy to install plug and play tuner that attaches to sensors in the engine bay and works with your factory ECU tuning to remap boost, timing, and fueling for optimal performance and reduced turbo lag. Includes full SENT sensor technology required for properly tuning the latest Audi platforms. Includes full CANbus allowing the JB4 to access and incorporate all engine data in it's tuning strategies, incorporate unique safety features such as keeping boost pressure low until oil and water is up to temperature to provide proper engine and turbo lubrication and drop to a low boost map if the engine starts to overheat, run lean, excessively knock, or over boost. Includes fuel control for ethanol mixture mapping. Fully compatible with JB4 mobile for on the fly map changes, data logging, firmware updates, and much more. Installation is very discrete and it quickly removes without a trace when needed. Fuel economy during normal driving is unchanged. Compatible with all driving modes. Made in the USA. 5 year warranty.

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.

Revision 2 now includes an integrated boost control connection which can be optionally connected for higher power applications. You no longer need to purchase a separate BCM module for this!

JB4 Features & Benefits

• Improves 0-60 times and 1/4 mile times
• Preloaded with custom tuning software and up to 8 maps for various fuel and modification levels
• 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
• 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

Vehicle Fitment


  • 2017-Present Audi B9/9.5 S4 3.0TFSI
  • 2017-Present Audi B9/9.5 S5 3.0TFSI
  • 2017-Present Audi B9/9.5 MK2 SQ5 3.0TFSI
  • 2017-Present Audi B9/9.5 RS4
  • 2017-Present Audi B9/9.5 RS5
  • 2018-Present Audi C8 A6/7 3.0TFSI/55
  • 2017-Present Audi Q7 3.0TFSI/55
  • 2017-Present Audi Q8 3.0TFSI/55


  • 2019-Present Porsche Macan S Facelift
  • 2012-Present Porsche E3 Cayenne
For any VW/Audi sales, support, and technical questions please contact George at George is the only BMS representative familiar with the VW/Audi platform.

Dragy testing on a 100% factory S4 with JB4 and 30% E85 fuel.

Dragy testing on a 100% factory Audi S4 with JB4 and 30% E85 fuel 0-60 1/4 mile time

Customer dragy testing with JB4, 93 octane, and a few bolt-on mods

Audi S4 dragy testing with JB4, 93 octane bolt-on mods 0-60 1/4 mile times


Customer provided Audi B9 S4 race video showing JB4 in action