The BMW 1 Series Sedan 118i 136hp (F52 - 2018 ->) produces 136bhp and 220Nm in standard form. Our Stage 1 ECU tuning file raises output to 170bhp and 300Nm, a gain of 34bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.