If you aren't using wireless carplay (which is only available currently on a few after market head units) then Bluetooth isn't needed when using carplay.
If you aren't using wireless carplay (which is only available currently on a few after market head units) then Bluetooth isn't needed when using carplay.
Most Car Play units require the phone be connected via USB to the head unit. They don't work wirelessly. You would need a head unit that supports Car Play.
There are some newer head units that now support wireless Car Play which uses a mix of Bluetooth and wifi for the connection instead of USB.
If you aren't using wireless carplay (which is only available currently on a few after market head units) then Bluetooth isn't needed when using carplay.