The BMW X5 4.6i 347hp (E53 - 2000 - 2007) produces 347bhp and 480Nm in standard form. Our Stage 1 ECU tuning file raises output to 360bhp and 500Nm, a gain of 13bhp and 20Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.