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depending on your vehicle year and options, bmw’s had a built-in microphone for handsfree calling. It does not support music. Later years also had an “on-star like” telematics system with the SOS button between the seats. If you want to add bluetooth, there are a number of options.
The simplest, cheapest way is to buy a $20 bluetooth FM transmitter. It plugs into the cigarette lighter and has a USB port. find a quiet unused FM frequency and tune your car’s FM radio to that frequency, plug in a USB cable to your phone and you’re set. You’ll get wireless bluetooth for music, nav and phone calls while keeping your phone charged.
You can add a bluetooth dongle to the back of your stock head unit to create a wireless aux input.
You can ditch the stock head unit entirely and go for an aftermarket unit with bluetooth built in…but be aware that this option works best with the standard radio. If you have the pop up nav screen, you may have the carver DSP “premium audio” setup. if you do, you can’t just swap in a new stereo. You may need to replace the amp and possibly the speakers too.
Lastly,there are add-on units from companies like Grom wnd Bluebus that add bluetooth through an adapter box that usually connects in the trunk.
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