Any difference between the 2011 and 2012 Head Unit?

Hi all,

I'd like to get some advice or share your experience with replacing the OEM radio in a 2013 CX-9 with Bose system. I've just purchased Metra MZTO-01 adaptor and tried to connect it with my Pioneer AVIC-F50BT unit. The only result is that when I turn on the ACC or ignition, loud interrupted beep sound comes out from speakers.

Could anybody please give me advice on what can be wrong? I'd appreciate advice on connections from someone who's using this adaptor or some experience with replacing the OEM radio in 2013 CX-9 with Bose.

Any help will be greatly appreciated. Thanks.
Hi @melodiecb - I know this is a very old thread, but I've recently installed a new Kenwood head unit in my CX-9 (2015) and had this exact same loud beeping sound. Did you ever come to a solution? My head unit works fine until I plug in the Connects2 steering wheel control adapter - then the loud beeping keeps going until I remove the key
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