Reddit mentions of Coodio USB Bluetooth Music Audio Stereo Receiver Fit for Car AUX in Home Mp3 Speaker iPhone.

Bluetooth audio is supported by the 2013 and up BUT you can inexpensively get around it by tucking one of these in your center console.

http://www.amazon.com/Coodio-Bluetooth-Receiver-Speaker-Iphone/dp/B00HT07QXI#Ask

You could take apart one of these and use it. Just have to figure out how to supply it with USB power (5v I think)...

https://www.amazon.com/gp/product/B00HT07QXI

Works just dandy. It's plugged into my 4 port USB charger (for power) and a 3.5mm to 3.5mm cable plugs into my AUX input. It's not for calls, etc, just for audio out.

https://www.amazon.com/Coodio-Bluetooth-Receiver-Speaker-Iphone/dp/B00HT07QXI/ref=sr_1_4?ie=UTF8&qid=1505421058&sr=8-4&keywords=aux+usb+bluetooth

$8.00 and all you need is a usb power in.

I use this adapter in my CTS4.

• It connects through the AUX jack in the center console
  
• It uses a 12V USB adapter to power it (also in the center console)
  
• It connects automatically
  
• It stays out of sight
  
• The whole setup is well under $10

Amazon has these that's usb powered. I have one for my older Kenwood head unit, it has a usb slot right next to the aux port, so it's perfect.

So the only caveat is that it doesn't route phone calls to the aux port from my HTC M8, just media audio.

There's a link on my blog page, but here it is.

If you're using a 12 V line you'll have to regulate it down to 5V, which isn't a huge deal except if you hunt around on the stereo board you're bound to find a 5V line somewhere to tap into. Godspeed!

Order this. Less than $5 and it will give your car bluetooth. It turns on and off with the car, super slick.

here's (what looks like the same one) for 4.50

I'm not sure that the USB interface works with audio on newer phones.

I use a cheap Bluetooth audio adapter to play music in my 2009 128i, and if you want to use something similar but have steering wheel controls enabled you need to pay quite a bit more.

https://www.amazon.com/Coodio-Bluetooth-Receiver-Speaker-Iphone/dp/B00HT07QXI

This, an off the shelf USB lighter adaptor and a cassette adapter make any car with a cassette player bluetooth capable for under $15. I don't have any regrets.

> If it matches your battery, and the receiver works directly from the battery, you may have all you need.

I don´t have a Battery yet, that´s the main problem. I´m not sure what type of source I should get, or what I need.

> The charger should do that. If not, it's broken.

Well, the description of the charger Board I already ordered weeks ago isn´t saying anything about a protection. the title says only "Protection" without any context, so I don´t know. But I´ll probably order a Powerbank PCB, perhaps even with LCD Screen to be able to see the power usage, for this.

> If we bought the same one, yes. But we probably didn't, so do your own testing.

Well, I don´t actually think all these receivers are that different. I ordered one similar to this one .

iphone and the iBooks app. Bluetooth headphones is a must. I can work out forever listening to a book. I listened to tom clancy red rabbit this morning for a 40 minute gym session.

I understand you don't like to bring your phone to the gym, but for me it's all about the convenience of one device. I don't even use my point and shoot camera anymore for the same reason, too many devices is too troublesome. Then you have to charge all the separate devices too. Same with my old trusty mp3 player, in college it was great but the phone does it all and more. Then when I get in my car, the phone connects to my cheapo bluetooth adapter and my phone keeps playing the same book. And believe me, if my phone had wireless earphones somehow, you bet I'd stop using the other one I have in a heartbeat.

So I get your point, its frustrating when stuff doesn't work right. But have you tried the cable they are telling you that you need? If they tell you thats what it is, then tell them to get one and test it out before you pay for it. Seems pretty straight forward right?

For what its worth, I find these factory stereos to be so useless with tech. I had a VW that constantly froze on the Navigation screen if I had a phone call come in, and a Jeep that liked to randomly reject my phone too. For my Mini, I just bought a $10 Bluetooth adaptor off of Amazon, it plugs into the USB and a 3.5mm cord that's like 2 inches long from it plugs into the 3.5 port beside the USB. Bam, I put my phone in a cradle that is on the dash and I have instant Nav/Google Play/Android Auto/Music/ whatever without the bullshit or cords. Its like a nav screen, only I didnt have to pay like $2 grand for it. I get in my car and it instantly connects, every time.

Also just so you know, you might as well go out in your backyard and set your money on fire if you want to go the lawyer route. Again I get where you are coming from, and yes it should work, but they'll just blame it on the phone and theres no way you can prove its not the phones fault. If you read the fine print in your manual I bet it has language thats something along the lines of, "...will work with compatible smartphones," or something to that effect. All they have to do is say they dont guarantee compatibility with every phone and you are up shit creek.

Sorry for the response that's the length of a novel.

Edit: here's the link to the adaptor I bought. It took a month to get here, and youll have instant Bluetooth, won't even need the USB cord for the iPhone.

https://www.amazon.ca/dp/B00HT07QXI/ref=cm_sw_r_cp_awdb_SHwhAb1TX21YE

I don't like FM transmitters, but if you just need bluetooth and have a spare usb port in the car somewhere (even cigarette port adapter), something as simple as this works great.

https://www.amazon.com/Coodio-Bluetooth-Receiver-Speaker-Iphone/dp/B00HT07QXI/ref=sr_1_26?s=electronics&ie=UTF8&qid=1484154135&sr=1-26&keywords=usb+aux+bluetooth+adapter

My car doesn't have bluetooth but it had a usb and aux port right next to one another in the arm rest and this way is hidden from sight in my case.