Hi All -
If you are in need of a good bluetooth Audio adapter to play music over your AUX connection, I highly recommend this BOSE adapter from Amazon
I've tried other cheaper alternatives from china that sort of worked well but didn't always maintain connection or were cheaply made.
This BOSE adapter has been the most solid and reliable unit yet. It can pair up to 8 Devices and use 3 connected devices at the same time as long as your Phone/Tablet utilize the Bluetooth 4.0 specification. Everything you need comes in the box except a cigarette lighter to USB adapter (you can use any as long as it outputs greater than 5V 1.0A power)
The Bose BT adapter connects almost instantly when I start the car and is ready to go. It also connected to my car Bluetooth handsfree phone system at the same time and they both work beautifully together. Once my call ends, the Bose BT adapter goes back to playing music.
When my fiance is in the car we both pair to the Bose adapter and can each take turns playing music from our phones as they are both connected at the same time.
I also recommend getting a good ground loop noice isolater to connect between the bluetooth adapter and your audio-in connection as seen here
There is a slight "feedback" sound when you raise the volume all the way up and this removes all noise from the line and gives you very clear and loud audio.
As a bonus, I went to my local hobby shop and got a small piece of wood, some spray glue and black felt to create a door to cover the bluetooth adapter and all associated wiring to provide a clean look when anyone opens the armrest. It also allows me to still used the storage space as seen below. I cut the wood just big enough to fit inside with some pressure on all sides which holds it up just fine and carries the weight of anything I place on top of it. It came out looking like a factory installed option! Just be sure to attach a piece of felt to act as a handle so that you can pull up on it and open easily, otherwise it will be a b*tch to get out!
Here are some photos, enjoy!