The BMW 3 Series 318i 118hp (E46 - 1998 - 2005) produces 118bhp and 180Nm in standard form. Our Stage 1 ECU tuning file raises output to 131bhp and 200Nm, a gain of 13bhp and 20Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.