The BMW 1 Series 123D 204hp (E87 - 2007 - 2011) produces 204bhp and 400Nm in standard form. Our Stage 1 ECU tuning file raises output to 245bhp and 450Nm, a gain of 41bhp and 50Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.