The Audi A4 2.0 TDI 190hp (B9 - 2015 - 2018) produces 190bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 225bhp and 460Nm, a gain of 35bhp and 60Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.