The BMW 1 Series 125i 224hp (F20 - 2015 - 2018) produces 224bhp and 310Nm in standard form. Our Stage 1 ECU tuning file raises output to 270bhp and 440Nm, a gain of 46bhp and 130Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.