The BMW 5 Series 528i 193hp (E39 - 1995 - 2003) produces 193bhp and 280Nm in standard form. Our Stage 1 ECU tuning file raises output to 209bhp and 302Nm, a gain of 16bhp and 22Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.