The BMW X3 2.0i 150hp (E83 - 2004 - 2010) produces 150bhp and 200Nm in standard form. Our Stage 1 ECU tuning file raises output to 165bhp and 220Nm, a gain of 15bhp and 20Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.