Unlock the hidden performance potential of your 2025+ Volkswagen Tiguan or 2025+ Audi A5 / 2026+ Audi Q5 B10 equipped with the latest EA888 Gen5 2.0T turbocharged engine with the Burger Motorsports (BMS) JB4 Performance Tuner.

The JB4 is the most advanced plug-and-play tuning solution available, delivering gains of up to 40 wheel horsepower and 55 wheel torque on a completely stock vehicle. By working alongside the factory ECU, the JB4 intelligently adjusts boost pressure, ignition timing, and fueling strategies to increase power, improve throttle response, and reduce turbo lag while maintaining factory-like drivability.

Unlike basic tuning chips, the JB4 features advanced CANbus integration, allowing the system to monitor and adapt to real-time vehicle data including throttle position, accelerator input, engine speed, gear selection, air/fuel ratio, fuel trims, ignition timing, knock activity, and more. This allows the JB4 to provide optimized performance while maintaining critical factory safety systems.

The JB4 includes built-in protection features that help safeguard your engine and turbocharger. Boost levels remain limited until engine oil and coolant temperatures reach proper operating conditions, and the system can automatically reduce power if excessive knock, overheating, lean conditions, or overboost situations are detected.

Installation is simple and completely reversible with the included plug-and-play harness. No ECU flashing, permanent modifications, or dealer programming are required. The JB4 can be discreetly installed and removed without leaving a trace.

With multiple performance maps included, the JB4 supports 91 octane, 93 octane, and E85 ethanol blends, allowing you to customize performance based on your fuel quality and modifications. Fuel economy remains unchanged during normal driving, and the JB4 works seamlessly with all factory driving modes.

The included JB4PRO App provides wireless control through your iOS or Android device. Monitor engine data, switch maps, record performance logs, analyze vehicle parameters, update firmware, and access advanced tuning features directly from your smartphone.

Designed and assembled in the USA, the JB4 continues to set the standard for plug-and-play turbocharged performance tuning worldwide.

JB4 Features & Benefits

• Gains of up to 40 WHP and 55 WTQ
• Improves acceleration, 0–60 times, and quarter-mile performance
• Multiple tuning maps for different fuel types
• Supports E85 ethanol blends
• Plug-and-play installation
• No ECU flashing required
• Full CANbus integration
• Real-time engine data monitoring
• Reads and clears diagnostic trouble codes
• Logs up to 40 engine parameters
• Boost-by-gear control for improved traction
• Exhaust valve control on supported vehicles
• Compatible with JB4PRO App
• Improved safety compared to basic tuning chips
• Maintains factory drivability
• Compatible with all factory driving modes
• No fuel economy impact during normal driving
• Requires 91 octane or higher for performance gains
• Fully removable and not VIN locked
• Billet aluminum enclosure
• Designed and assembled in the USA
• 5-year warranty

JB4PRO App Features

• Wireless Bluetooth connection
• Compatible with iOS and Android devices
• Change performance maps instantly
• Monitor live engine data
• Record and analyze datalogs
• Update JB4 firmware
• Advanced diagnostic tools
• Performance estimation features
• User-friendly interface

Vehicle Fitment

Volkswagen Tiguan

• 2025+ Volkswagen Tiguan 2.0T EA888 Gen5 – 201 HP
• 2026+ Volkswagen Tiguan R-Line Turbo 2.0T EA888 Gen5 – 268 HP

Audi A5 (B10)

• 2025+ Audi A5 B10 2.0T EA888 Gen5 – 268 HP

Audi Q5 (B10)

• 2026+ Audi Q5 B10 2.0T EA888 Gen5 – 268 HP

What Is a JB4?

The JB4 is a plug-and-play performance tuner designed for modern turbocharged vehicles. It installs between the vehicle's engine sensors and ECU, allowing it to optimize performance without permanently altering factory ECU software.

Through advanced CANbus communication, fuel and spark control, Bluetooth connectivity, and real-time monitoring, the JB4 provides performance improvements comparable to ECU tuning while maintaining factory safety features.

Unlike VIN-locked ECU flashes, the JB4 can be quickly removed, transferred between vehicles, or resold. Continuous firmware and map updates from Burger Motorsports allow the system to evolve with future performance developments.

Is the JB4 a Real Tune?

Yes. The JB4 is a true performance tuning system. By monitoring and adjusting key engine parameters such as boost pressure, ignition timing, air/fuel ratio, and fuel trims, the JB4 actively modifies engine performance in real time.

The result is increased horsepower and torque with smooth OEM-like operation while keeping factory protection systems active and avoiding ECU unlocking or permanent software changes.

Specifications

• Brand: Burger Motorsports (BMS)
• Product Type: Plug-and-Play Performance Tuner
• Engine Compatibility: EA888 Gen5 2.0T Turbo
• Communication: CANbus + Bluetooth
• App: JB4PRO App
• Fuel Support: 91 Octane, 93 Octane, E85 Blends
• Installation: Plug-and-Play
• Housing: Billet Aluminum Enclosure
• Made In: USA
• Warranty: 5 Years