Thank you for reaching out. It is most likely overheating because due to other apps and GPS services running in the background when connected to Android Auto. If you are charging your phone wirelessly due to Android auto being a resource-intensive app it could cause your device to overheat. Another thing that could cause your device to overheat while using a USB-C cable and running a resource-intensive app is the temperature in the car. I would also recommend keeping the device out of direct sunlight while the Android auto app is in use. Also, make sure to keep the background apps closed and optimize your device. Another step would be to clear the cache on your Android auto app. If you continue to experience these symptoms, I would recommend reaching out to the Android auto developers for further assistance.
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