The BMW 5 Series 525i 192hp (E39 - 1995 - 2003) produces 192bhp and 245Nm in standard form. Our Stage 1 ECU tuning file raises output to 208bhp and 270Nm, a gain of 16bhp and 25Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.