BMW S58 JB4 & JB4PRO Performance Tuner

Unlock more performance from your BMW M2, M3, or M4 without unlocking or flashing your factory ECU.

The Burger Motorsports JB4 Performance Tuner delivers a powerful plug-and-play tuning solution for BMW's twin-turbocharged S58 engine. Designed for the G87 M2, G80 M3, G82 M4 Coupe, and G83 M4 Convertible, the JB4 offers increased boost performance, selectable tuning maps, wireless smartphone control, and advanced engine data monitoring.

Available from M-Tech Performance in two configurations: JB4 for everyday performance enthusiasts and JB4PRO for drivers seeking additional tuning capabilities and hardware integration.

Both systems support the free JB4PRO smartphone app.

BMW S58 JB4 Horsepower & Torque Gains

Want more acceleration from your S58 without a traditional ECU flash?

Burger Motorsports reports the following performance potential:

• Premium pump gas: Gains of approximately 80 wheel horsepower and 100 wheel lb-ft of torque.
• Higher-octane fuel or compatible ethanol mixtures: Potential gains of up to 150 wheel horsepower and 175 wheel lb-ft of torque.

Performance results depend on fuel quality, vehicle configuration, supporting modifications, environmental conditions, and the selected tuning map. These are manufacturer-reported results, not guaranteed gains for every vehicle.

Choose Your S58 Tuning System

Standard JB4 Performance Tuner

The standard JB4 is designed for BMW owners who want a significant performance improvement while retaining their existing factory ECU software.

• Plug-and-play tuning hardware.
• Multiple selectable performance maps.
• Compatible wireless smartphone control using the JB4PRO app and appropriate connection hardware.
• Live engine monitoring and data logging.
• CANbus integration and supported diagnostic features.
• Boost-by-gear adjustments for improved traction.
• Support for approved fuel and ethanol-blend configurations.
• Removable hardware without ECU software flashing.

Best suited for: BMW S58 owners seeking improved acceleration, configurable performance, and convenient everyday usability.

JB4PRO Performance Tuner

Planning to take your S58 further? The JB4PRO expands on the standard system with advanced hardware designed for more extensively modified builds.

• Built-in Bluetooth connectivity.
• Integrated onboard data-logging memory.
• Additional fuel-pressure monitoring and control capabilities.
• Supported flex-fuel and ethanol-sensor integration.
• Supported port-injection and water/methanol-injection control capabilities with compatible accessories.
• Additional hardware expansion capabilities.
• Free compatible firmware updates as released by Burger Motorsports.
• Full compatibility with the free JB4PRO smartphone app.

Best suited for: Higher-performance BMW S58 applications, vehicles with advanced fueling modifications, and owners planning further power upgrades.

Important: Advanced JB4PRO functions may require separate harnesses, sensors, injectors, or other supporting hardware. These components are not automatically included with the tuner.

BMW S58 JB4 Vehicle Compatibility

This product is intended for compatible BMW vehicles equipped with the S58 3.0-liter twin-turbocharged inline-six engine.

BMW M2 - G87

• 2023+ BMW M2 (G87)
• 2026 BMW M2 CS (G87)
• Supplier-listed 2027+ BMW M2 xDrive applications, subject to compatibility confirmation

BMW M3 - G80

• 2021+ BMW M3 (G80)
• 2021+ BMW M3 Competition (G80)
• BMW M3 Competition xDrive (G80)
• 2024 BMW M3 CS (G80)
• Supplier-listed 2027 BMW M3 CS Handschalter, subject to compatibility confirmation

BMW M4 Coupe - G82

• 2021+ BMW M4 Coupe (G82)
• 2021+ BMW M4 Competition (G82)
• BMW M4 Competition xDrive (G82)
• 2023 BMW M4 CSL (G82)
• 2025 BMW M4 CS (G82)

BMW M4 Convertible - G83

• 2022+ BMW M4 Competition Convertible (G83)
• BMW M4 Competition Convertible xDrive (G83)

Fitment notice: Vehicle production dates, ECU revisions, regional specifications, and future model changes can affect compatibility. Contact M-Tech Performance with your VIN if you are unsure which application is suitable.

BMW X3M and X4M owners: These S58-powered vehicles use a different JB4 application. Contact M-Tech Performance for the correct hardware.

JB4PRO Smartphone App - Wireless Tuning Control

Manage supported JB4 tuning functions using Burger Motorsports' free JB4PRO app for compatible iOS and Android devices.

Depending on the selected hardware and supported firmware, the app allows you to:

• Switch between available performance maps.
• Monitor live engine parameters.
• Record and analyze engine data logs.
• Review supported fault codes and diagnostics.
• Adjust supported tuning settings.
• Install compatible JB4 firmware updates.

The standard JB4 uses compatible wireless connection hardware, while the JB4PRO system incorporates Bluetooth directly into its upgraded hardware.

How the JB4 Works With Your Factory ECU

The JB4 is a piggyback performance tuner that integrates with selected factory engine sensors and the vehicle's engine-management system.

It processes operating data and adjusts supported tuning parameters without replacing the original factory ECU calibration.

No FEMTO unlock or traditional ECU flash is required for normal supported JB4 operation.

The hardware can be removed, and the system is not permanently VIN-locked. However, removability does not guarantee that prior operation cannot be detected or that vehicle warranty coverage will remain unaffected.

Fuel Requirements & Performance Maps

Performance tuning requires suitable fuel quality. Burger Motorsports specifies premium 91 octane or higher for performance gains.

Supported higher-octane and ethanol-blend maps can provide additional performance potential when used with the appropriate vehicle setup.

Do not select aggressive boost settings or ethanol configurations without checking your vehicle's fuel system, supporting modifications, and the applicable JB4 map requirements.

Fuel-system upgrades, ethanol sensors, or supplemental injection hardware may be required for certain advanced configurations.

What's Included With Your S58 JB4 Purchase?

• Genuine Burger Motorsports S58 JB4 or JB4PRO tuner, based on the system selected.
• Applicable plug-and-play S58 wiring connections.
• Compatible access to the free JB4PRO smartphone app.
• Standard product documentation and applicable manufacturer firmware support.
• Burger Motorsports' advertised 5-year product warranty, subject to manufacturer terms.

JB4PRO-specific advanced control features require the PRO hardware and, where applicable, separately purchased accessories.

Frequently Asked Questions

Does the JB4 work with a locked BMW S58 ECU?

Yes. The JB4 operates as a piggyback tuning system and does not require a traditional ECU unlock or flash for supported applications.

What is the difference between JB4 and JB4PRO?

The standard JB4 provides plug-and-play engine tuning, map selection, data monitoring, and supported diagnostic functions. JB4PRO adds more advanced hardware, built-in Bluetooth, onboard logging memory, and expanded fueling and auxiliary-control capabilities.

Is the JB4PRO smartphone app free?

Yes. Burger Motorsports provides the compatible JB4PRO app at no additional app-purchase cost for both supported tuning systems.

Can I switch between different tuning maps?

Yes. The JB4 supports multiple maps designed for supported fuel types, vehicle modifications, and operating requirements.

Can I use the JB4 with E85 fuel?

Compatible ethanol-blend configurations are supported, but the available maps and required fuel-system hardware vary. Confirm your vehicle's configuration before using higher ethanol concentrations.

Can the JB4 be removed?

Yes. The JB4 uses removable hardware connections rather than permanently replacing your factory ECU software.

Does the JB4 void my BMW warranty?

Warranty decisions depend on the vehicle manufacturer's policies, the circumstances of a claim, and applicable law. Performance modifications can affect warranty coverage. Consult your dealer or warranty provider before installation.

Will this work on the BMW X3M or X4M?

Not under this G8X-specific listing. The S58-powered X3M and X4M require the appropriate application-specific JB4 hardware.

Order Your BMW S58 JB4 From M-Tech Performance

Upgrade your BMW M2, M3, or M4 with genuine Burger Motorsports performance tuning from M-Tech Performance.

Select your preferred JB4 or JB4PRO system above to get started.

Have questions about fitment, fueling upgrades, or the right tuning system for your build? Contact our team before ordering.

Call M-Tech Performance: (954) 988-8324

M-Tech Performance | BMW Performance Parts & Custom ECU Tuning