The BMW X1 1.8i 136hp (E84 - 2009 - 2012) produces 136bhp and 200Nm in standard form. Our Stage 1 ECU tuning file raises output to 165bhp and 220Nm, a gain of 29bhp and 20Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.