525iSE

I have a March 04 production... I don't have bluetooth... I'm confused, do i need to buy a new part to install in the car or do I just have to activate it with the dealer? If i have to buy the part, how much?

cobradav

4. For E60/63/64 vehicles produced from 3/04 to 8/04, Bluetooth? functionality can be added to most of these vehicles by updating the vehicle software using CIP 13.2 or higher. After this is performed "Retrofit" of "Tel Bluetooth" needs to be performed. Follow the procedure as described in this Service Information for "Activating Bluetooth" and "Pairing the Handset". Vehicles prior to 3/04 would need to have the TCU replaced with the 2005 MY TCU at the customer's expense and the vehicle updated to CIP 13.2 or higher. Phone docking cradles may not be added to these vehicles because of wiring incompatibility. Note: This software update and retrofit is not covered under warranty and is at the customer's expense.

If you do not have proper TCU then you are looking at ~$2000 total

Bad part number = 84116948921
Good part number = 84106978659

merklebob

you can always add a motolora blue tooth unit. it uses voice technology but does not show phone number as the bmw unit does. only $150 to 200 plus instalution.