Description
E Chassis N55 BMW JB4 Tuner – Ultimate Plug & Play Performance Upgrade
Unlock the full potential of your N55-powered BMW with the JB4 Tuner, delivering up to 60 horsepower and 60 lb-ft of torque at the wheels on a completely stock vehicle. On fully modified setups, the JB4 can achieve up to 100 horsepower to the wheels, transforming your car’s performance with precision and reliability.
The JB4 features a plug & play installation harness, making it the easiest way to upgrade your BMW without complicated modifications or ECU reflashes. With the latest JB4 technology, you gain access to a suite of advanced features not found in any other tuning solution:
- In-dash map switching – toggle between factory and multiple performance maps on the fly
- Optional gauge displays – monitor boost, AFR, and other critical engine parameters
- Progressive water/methanol injection support
- E85 ethanol fuel compatibility
- Built-in fault code reading and deletion
The JB4PRO adapter and free smartphone app are now included, allowing wireless connectivity to your iOS or Android device. Control performance maps, log real-time vehicle data, and update firmware with ease. The JB4PRO app offers advanced logging analysis, helping optimize performance while maintaining factory-level safety.
Key Features & Benefits
- Up to 60hp and 60lb-ft torque gains on stock N55 engines
- Significant improvement in 0-60 mph and quarter-mile times
- Multiple tuning maps for 91+ octane and E85 fuels
- Plug & play installation; no ECU unlock required
- Full CANbus integration for factory-level smooth operation
- Boost-by-gear control for improved traction
- Reads and deletes fault codes; logs up to 40 engine parameters
- No impact on fuel economy during normal driving
- Compatible with all driving modes; not VIN locked
- Durable billet aluminum enclosure; designed and assembled in the USA
- 5-year warranty
Vehicle Fitment
BMW 1 Series:
- 2011–2013 N55 E82 / E88 135i LHD
BMW 3 Series:
- 2011 N55 E90 / E91 335i including xDrive
- 2011–2013 N55 E92 / E93 335i including xDrive
BMW X Series:
- 2013–2015 N55 E84 X1 35i xDrive
- 2011–2013 N55 E70 X5 35i including xDrive
- 2011–2013 N55 E71 X6 35i including xDrive
About the JB4
The JB4 is a true plug & play tuning solution for turbocharged vehicles, manipulating engine performance by connecting directly to your sensors and DME/ECU. Unlike basic chips or other tuners, the JB4 offers advanced CANbus control, real-time boost and fuel management, smartphone connectivity, and ongoing firmware updates. It’s not VIN-locked, easily removable, and can be transferred between vehicles, making it a flexible and safe choice for enthusiasts.
With over a decade as the gold standard in turbocharged performance tuning, the JB4 delivers safe, smooth, and highly reliable power gains while maintaining factory safety systems.
