Car manufacturers could comply with the law “by using short-range wireless protocols, such as via Bluetooth,” to give owners or independent shops authorized by owners access to the information they need to diagnose issues with and repair vehicles, the letter says.
Hopefully no manufacturers are allowing changes to the vehicle wirelessly. It should be read-only.
Given enough time and popularity, I could see third-party programming being a thing. They already have stuff like HP Tuners, which can program a GM ECU for mods/performance.
They’re already hacking Teslas and stealing Hyundais/Kias with a USB stick. It won’t take long.