You may own your car, but you don’t own the software that makes it work— that still belongs to your car’s manufacturer. You’re allowed to use the software, but in the past, trying to alter it in any way (including fixing it by yourself when it breaks or patching security holes) was a form of copyright infringement. iFixit, Repair.org, the Electronic Frontier Foundation (EFF), and many others think this is ridiculous, and they’ve been lobbying the government to try to change things.
A year ago, the U.S. Copyright Office agreed that people should be able to modify the software that runs cars that they own, and as of last Friday, that ruling came into effect. It’s good for only two years, though, so get hacking.
The legal and technical distinction between physical ownership and digital ownership is perhaps most familiar in the context of DVD movies. You can go to the store and buy a DVD, and when you do, you own that DVD. You don’t, however, own the movie that comes on it: Instead, it’s more like you own limited rights to watch the movie, which is a very different thing. If the DVD is protected by Digital Rights Management (DRM) software, the Digital Millennium Copyright Act (DMCA) says that you are not allowed to circumvent that software, even if you’re just trying to watch the movie on a different device, change the region restriction so that you can watch it in a different country, or do any number of other things that it really seems like you should be able to do with a piece of media that you paid 20 bucks for.
Source: IEEE Spectrum Cars That Think.