[quote author=keesje500 link=topic=12735.msg258691#msg258691 date=1369804827]if the after market readio supports bluetooth, than handsfree will work I'm sorry Kees, but if you don't know the righ answer, don't react please. SwattiMatti links to an external Bleutooth system, not an integrated system. If you exchange radio's make sure to pull the plugs from the OEM radio and put tham into the new one. Leave all other cables in place and the handsfree will keep working. In fact, it will even work WITHOUT any radio installed in the car! On the back of the OEM radio there's a yellow mini-ISO with a yellow wire in it. Snip off that wire and connect it to the Phone-mute wire of your new radio, so it will properly mute when you make or recieve a phonecall.