JB4 Fuel Pressure Upgrade Kit for BMW B48 / B58 Gen 2 / S58

What the fuel-pressure upgrade adds

This upgrade adds a high-pressure fuel sensor connection to a compatible JB4 system, allowing it to read fuel pressure and trims directly. The manufacturer notes particular usefulness for manual-transmission cars and locked-ECU setups running high ethanol blends.

Select the engine version

The selector offers B48 (2020+), B58 Gen 2 and S58. The kit includes a replacement JB4 board and a fuel-pressure sensor harness that connects to the existing JB4 harness. It is not compatible with B58 Gen 1 and is not a stand-alone JB4 tuner.

Before ordering

Confirm engine generation and that the vehicle already has a compatible JB4 system. Select the option for the vehicle platform; versions are not interchangeable.