iPhone 7 Plus - USB connect Car Audio

in iPhone
Just upgraded from the 6 Plus to the 7 Plus and the new 7 Plus won't play through my car stereo through the USB port like every other iPhone did.  
Is this because the new phone uses the one port at the bottom to both charge and listen to music?  
Super frustrating because while I can listen through bluetooth while the battery drains, the phone's audio will not play anything while connected through the USB port.  

Anyone else having these issues?  Any fixes for this?
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