Very interesting - thanks dcherry88.
Not sure if this link will work or not, but on Ebay you can see the backs of the older navigation units - does the back of this one as an example seem to have the same wiring?
https://www.ebay.com (commissions earned)
I'm in the process of upgrading the head unit and speakers on a 2016 CX-5 Sport (Basic head unit with 4 speakers) and just confirmed that the harnesses in the back are different(exactly like dcherry88 pics). I will go ahead and install the speakers and return the PAC RP4-MZ11 kit that works with the 2015 models because I don't want to cut wires, even though I'm pretty sure they are color coded like the older models. Let's keep this post active and see if somebody finds a way around it or a new wiring kit is released.
Care to review how the speaker upgrade performs with the stock head-unit? What did you upgrade to? Did you add the additional two speakers?
I know. It will be a waiting game for the new adapters to come out I guess. Unless somebody figures out something soon.
Crutchfield still doesn't list the 2016 CX-5. Let's keep this alive, anybody made any progress installing an aftermarket head unit on a 2016?!
pinouts for the radio plugs are available online so you could always hardwire the radio in without plugs.
http://www.mazdas247.com/forum/showthread.php?123847309-2016-Mazda-Connect-Head-Unit-pinout
From those diagrams the only thing left to question would be the SWC wires. They might be the ST-SW wires, but that can be tricky to test. (and hopefully an adapter can program in)
How about just the antenna connection, does anyone know of an adapter for the antenna? I can hardwire the powers, grounds, speakers etc.