The Audi A4 30 TDI (2.0D) 136hp (B9 - 2019 ->) produces 136bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 185bhp and 410Nm, a gain of 49bhp and 90Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.