The Volkswagen Jetta 1.9 TDI 90hp (2005 - 2011) produces 90bhp and 240Nm in standard form. Our Stage 1 ECU tuning file raises output to 140bhp and 320Nm, a gain of 50bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.