FTC: Warranty-voiding language like Nintendo’s and Sony’s is illegal
It's common for manufacturers of cars, video game consoles, and other products to insist that consumers will void their warranty if they use unauthorized repair services or unauthorized third-party parts. Some even insist that you'll void the warranty if you break the "warranty seal."
These policies are illegal, according to the Federal Trade Commission.
On Tuesday, the agency announced it had sent warning letters to six companies for violating a 1975 law governing manufacturer warranties.