Just wondering i saw a oem Porsche bluethooth module on ebay , i have a 2006 c4s i have the phone buttons but no phone so i asked the seller if i can put it into my car he said yes so i bought it no biggie was not expensive at all and i had no chance to research it at it was ending it but is it possible to add a bluethooth module or only aftermarket , thanks

 

I have a 2008 with same PCM (I think) and purchased the mobridge module (and it wasn't cheap). Works great, uses all the OEM features, I think the mic is in the steering wheel. Have not heard of a OEM module, but wish I had, I prefer OEM than aftermarket.