The BMW 3 Series 320d Efficient dynamics 163hp (F3x LCI - 06 / 2015 - 2019) produces 163bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 220bhp and 440Nm, a gain of 57bhp and 40Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.