The Audi A4 2.0 TDI 150hp (B9 - 2015 - 2018) produces 150bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 190bhp and 420Nm, a gain of 40bhp and 100Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.