The BMW X3 3.0D 204hp (E83 - 2004 - 2010) produces 204bhp and 410Nm in standard form. Our Stage 1 ECU tuning file raises output to 250bhp and 500Nm, a gain of 46bhp and 90Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.