Should I Install a JB4 Tuner on My BMW 330i or 430i?

The 330i and 430i are very popular BMW models. While both have very distinctive features, they are very much alike in terms of performance and powertrains.

The BMW 330i and 430i are equipped with the B48 engine, a 2.0-liter, turbocharged four-cylinder that produces up to 255 horsepower and 295 pound-feet of torque. This output of the B48 engine allows these cars to reach an approximate top speed of 155 mph, which is higher than most vehicles in their respective class. 

While Everything may seem perfect with these vehicles, there is always room for improvement. Here to answer that call is the 330i Jb4 Tuner boasting massive improvements in performance and a greater overall driving experience.

What is JB4 and why should you install it?

As the most advanced and highly featured tuning system, the Jb4 features simple plug-and-play installation. Features of the 330i Jb4 system include on-the-fly map switching between factory and various performance maps, optional in-dash gauge displays for boost, improved traction in lower gears, progressive water/methanol support, built-in data logging, built-in code reading, optional direct EWG to help prevent throttle closure with exhaust modifications, exhaust flap control and much more. While there are many piggyback tuners available, none compare to the JB4’s technology, features, and reliability. 

The JB4 tuning system doesn’t require any additional modifications or previous stages. You may simply install the JB4 system as your first and only modification and enjoy an entirely new driving experience. However, we strongly recommend pairing the JB4 with some supporting modifications to maximize its capabilities, these can be found here.

The JB4 is set up to grow with your vehicle as you decide to modify your car further. It’s said that the JB4 is the perfect mixture of performance, features, flexibility, and support, ensuring your car performs to the best of its potential. 

2017 BMW 230i with B48 Engine equipped with JB4:

2017 BMW 230i B48 JB4 dyno


How can I connect to my JB4 after installing it?

We highly recommend the Bluetooth connect kit add-on as it will allow you to wirelessly connect the JB4 to your Bluetooth 4.0 compatible iOS or Android device. You can also connect to your Windows laptop using a BMS data cable. Both connection options allow the recording and analyzing of tuning data, changing performance maps, and updating JB4 firmware. On-the-fly map changes, as well as some other features, are also available via the vehicle's in-dash controls.

Will the JB4 void the warranty of my BMW 330i or 430i?

No piggyback performance tuner will automatically void the factory coverage of your vehicle. However, the dealership may not honor a warranty claim if they believe that the tuner has been the cause of damage to the car. Though there is a warranty issue, in most cases the tuning system does not affect the warranty coverage at all. We still urge that you are wary of the risks before installing, as no guarantees of warranty coverage can be made.