The Volkswagen Polo 1.9 TDI 130hp (2001 - 2005 ( 9N )) produces 130bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 170bhp and 390Nm, a gain of 40bhp and 70Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.