Why isn't my bluetooth connecting to my car?

I have and iphone 5s and a 2013 hyundai. The bluetooth has always connected just fine with no problems, until all of a sudden, it won't connect. When i go to my phone settings, bluetooth is turned on, and where is says 'devices' it just says searching and it just searches forever and never finds my car, or anything else for that matter. I have restarted my phone, and car.

In the phone, delete the device. In the car delete the device. The pair them as though they were new.

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