Whenever Android Auto and car stop playing nicely for me I replace the USB cable with one in about the 5 to 8 quid range from Amazon, and it works for about a year.
Last time, I looked at these new WiFi adaptor things, but not yet spent the fifty quid or so to get one.
9to5google.com/2021/08/19/carsifi-android-auto-wireless-dongle/
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