The BMW X4 xDrive30d 265hp (G02 - 2018 ->) produces 265bhp and 620Nm in standard form. Our Stage 1 ECU tuning file raises output to 310bhp and 650Nm, a gain of 45bhp and 30Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.