The BMW 3 Series 320D 150hp (E46 - 1998 - 2005) produces 150bhp and 330Nm in standard form. Our Stage 1 ECU tuning file raises output to 183bhp and 390Nm, a gain of 33bhp and 60Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.