I have a 2012 and was disappointed with the Bluetooth adapter option. I purchased
this one from Amazon, and I had trouble getting it to consistently connect to my phone. Rather than try other adapters, I decided to upgrade to the newer version. I bought the components used off of eBay, spent around $500 after getting component protection removed at the dealer. Yes it's no comparison to the price of an adapter, but it's well worth it to me. YMMV. Here are some threads if you are interested.
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Also, I highly recommend looking at the upgraded steering wheel from fly designs on eBay.
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These are the first two mods I did to my 2012, very happy with both.
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