I've got a wireless android auto adapter in my 2019 SEL EXEC. But it keeps failing to connect now to my phone. I've reset my phone and the car, cleared Bluetooth connections, turned off my watch which was syncing with the phone, and still it won't connect android auto.

I have another of the same unit in my wife's C-Max which works perfectly.

I'm at the end of things I can do I think, so will send the unit back. What units are people using successfully which I can replace it with? 

I've been using AAWireless for a number of years now - highly recommended.

Never had dropouts or performance issues.  

Connects every time.  Good quality.