The Mazda 3 1.4i 16v 84hp (2003 - 2009) produces 84bhp and 122Nm in standard form. Our Stage 1 ECU tuning file raises output to 90bhp and 135Nm, a gain of 6bhp and 13Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.