The BMW 4 Series 420d MHEV 190hp (G22 - 2020 ->) produces 190bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 220bhp and 480Nm, a gain of 30bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.