The BMW 3 Series GT 318D 136hp (F34 - 2012 - 2015) produces 136bhp and 320Nm in standard form. Our Stage 1 ECU tuning file raises output to 190bhp and 400Nm, a gain of 54bhp and 80Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.