The BMW 1 Series 118i 129hp (E87 - 2004 - 2007) produces 129bhp and 180Nm in standard form. Our Stage 1 ECU tuning file raises output to 145bhp and 200Nm, a gain of 16bhp and 20Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.