Hi Jesus,You want to pick up the Durametric software kit. The ehitusnast kit will allow you to diagnose 3 different porsches (if you want to do unlimited cars, get the professional version). This is the best software on the market for porsche short of the factory tools. You will need a laptop, or a computer set up close by (OBDII cable plugs into a USB port). More than likely it is either your passenger or driver seat belt buckle assembly.