Burger Motorsports JB4 for BMW GEN3 B48/B58 | BMS-B58-GEN-JB4

The JB4 is the most advanced and highly featured tuning system available for your B48/B58 GEN3 powered vehicle. Power gains are up to 100whp to the wheels (125hp crank) on a completely stock car on 93 octane, and even higher with ethanol fuel mixed in!

This new JB4 BMW tuner is specifically designed for the latest Gen 3 B48/B58 variant and is capable of processing the new ultra fast SENT digital sensor signals in real time with zero latency. The JB4 features a simple plug & play installation harness for easy installation & removal and includes many features not found with any other tune. Including on the fly in-app map switching between factory and various performance maps, boost limiting by gear for improved traction in lower gears, progressive water/methanol support, built-in data logging, built-in code reading, and much more. Other more expensive tuners may claim to equal the JB4's technology but upon closer examination lack most if not all of the JB4's features.

Remember the JB4 does not require any additional modifications or previous stages. Simply install the JB4 as your first and only modification and enjoy an entirely new fast and smooth racing experience. The JB4 also does not require any user setup or customization, but for those who are interested in logging, adding new features as we post them, etc, we suggest the Bluetooth mobile phone adapter.

Vehicle Fitment (GEN 3 B58)

⚠️This only fits the exact vehicles below. Does not plug into previous years B48/B58 engines due to different connectors on the newer B48/B58 engines. Click here for previous generation B58 engines.

BMW 2 Series
• 2023+ F44 B48 GEN3 BMW 228i xDrive Gran Coupe

BMW 3 Series
• 2025+ G20 G21 B58 GEN3 BMW M340i including xDrive
• 2025+ G20 G21 B48 GEN3 BMW M320i 

BMW 4 Series
• 2025+ G22 G23 G26 B58 GEN3 BMW M440i including Gran Coupe and xDrive

BMW 5 Series
• 2024+ G60 G61 B58 GEN3 BMW 540i including xDrive
• 2024+ G60 G61 B48 GEN3 BMW 530i, 530e including xDrive

BMW 7 Series
• 2023+ B58 GEN3 G70 BMW 740i

X Series
• 2023+ U11 U12 B48 GEN3 BMW X1 28i and xDrive28i
• 2025+ G45 B58 GEN3 X3 M50 xDrive
• 2024+ G05 B58 GEN3 BMW X5 M40i and xDrive40i
• 2024+ G06 B58 GEN3 X6 xDrive40i
• 2022+ G07 B58 GEN3 BMW X7 xDrive40i

• Free US shipping on orders over $250.
• Free pickup at our Dallas shop, usually ready within 24 hours.
• Unused parts can be returned within 30 days. Tunes, opened electronics, merch and installed parts are final sale.
• Want it installed? Book the install at thegbmotors.com.

Full details are on our shipping and returns page.