An anonymous reader writes: The Digital Millennium Copyright Act contains anti-circumvention prohibitions that affect everything from music files to cell phones. The EFF noticed that it could apply to cars as well, so they asked for an exemption to be put in place so car owners would be free to inspect and modify the code running on their vehicles. It turns out U.S. automakers don't agree — they filed opposition comments through trade associations. "They say you shouldn't be allowed to repair your own car because you might not do it right. They say you shouldn't be allowed to modify the code in your car because you might defraud a used car purchaser by changing the mileage. They say no one should be allowed to even look at the code without the manufacturer's permission because letting the public learn how cars work could help malicious hackers, "third-party software developers" (the horror!), and competitors. John Deere even argued that letting people modify car computer systems will result in them pirating music through the on-board entertainment system, which would be one of the more convoluted ways to copy media (and the exemption process doesn't authorize copyright infringement, anyway)."