The BMW 3 Series 320D 163hp (E90/E91 - 2005 - 2010) produces 163bhp and 350Nm in standard form. Our Stage 1 ECU tuning file raises output to 215bhp and 420Nm, a gain of 52bhp and 70Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.