No payable add on S/W activation needed what so ever.
This means that all you need is a programmer Xhorse VVDI Prog/xprog to read Porsche BCM.
Upload BCM data to Tango to generate new key file.
Write key file back to VVDI Prog.
Reference:
Porsche BCM 5M48H /1N35H (MC9S12XEP100) pinout to VVDI Prog programmer
www.obdii365.com
