The BMW 5 Series 520i 170hp (G30/31 - 2016 - 2019) produces 170bhp and 250Nm in standard form. Our Stage 1 ECU tuning file raises output to 220bhp and 310Nm, a gain of 50bhp and 60Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.