Was there a recall or technical bulletin dealing with the Mazda 3 radio? My wife has a 2014 and I seem to remember something about a recall, but can't find any information. We found a recall for the back up camera, and maybe that's what I'm thinking of.

 

I did not find any but you can check with the
(requires you to enter your information and the VIN of your vehicle)
Home (ntsb.gov)


For a radio I think you are well out of the recall range unless it had to do with a safety issue?

 

You'll have better luck searching the NHTSA website with your VIN: https://www.nhtsa.gov/recalls#vehicle

You can also call your local Mazda dealer with your VIN and ask about open recalls.