You can find the chip tuning file for your BMW 5 serie E39 - 1995 - 2003 525D 163hp vehicle on our site. These files are created especially for you and handed to you. All our Tuning files are extensively tested on Dynometer. The development of the tuning file for your BMW 5 serie E39 - 1995 - 2003 525D 163hp vehicle is the result of a special product by EcuPrime Engineers. In addition, we can increase the power of your vehicle from 163 HP to 195 HP, 350 Torque to 430 Torque.