We have a 2020 Hyundai Sante Fe, had an appointment at the dealer yesterday, State inspection & free oil change. I had received the same letter from the State & it talked about a anti theft software update to be installed by the dealer. The service writer said my vehicle wasn't involved, he also said he heard that Allstate insurance will be sending a letter to the affected vehicle owners that a stolen vehicle claim could be denied if the anti theft software was not installed. Again, he was not talking for Allstate, just what he had "heard"
John