From <https://arstechnica.com/cars/2022/02/radio-station-snafu-in-seattle-bricks-some-mazda-infotainment-systems/>: ... the problem began on January 30 and afflicted Mazdas from model years 2014 to 2017 when the cars were tuned to the local NPR station, KUOW 94.9. At some point during the day's broadcast, a signal from KUOW caused the Mazdas' infotainment systems to crash—the screens died and the radios were stuck on 94.9 FM. The problem was image files† in the HD radio stream that the infotainment system didn’t know how to decode (they were lacking filename extensions). So it crashed. But the files were still in its cache on reboot, so it tried to decode them again. And crashed again. And it appears, there is no way to get rid of those files or reset the system to a safe state without major hardware surgery. And a replacement unit costs USD1,500 -- if you can get one. Luckily, Mazda has advised that it knows about the problem, and will replace the affected units free of charge -- once supplies are available. †Radio with pictures? Who knew?