The BMW 5 Series 525i 192hp (E60/61 - 2003 - 2010) produces 192bhp and 245Nm in standard form. Our Stage 1 ECU tuning file raises output to 207bhp and 266Nm, a gain of 15bhp and 21Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.