The BMW 3 Series 330D 231hp (E90/E91 - 2005 - 2010) produces 231bhp and 500Nm in standard form. Our Stage 1 ECU tuning file raises output to 275bhp and 620Nm, a gain of 44bhp and 120Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.