To paraphrase a some top exec @ Volvo on this matter: "If you, as a car manufacturer, isn't ready to assume responsibility for your car, you need to get out of the business." It's the same as with every other (safety) feature, really... Who is responsible for the seatbelt to be working? Who is responsible for the airbags? The manufacturer as long as it's withing warranty. Who is responsible for everything else? The owner, who usually outsources the liability to an insurance company. If the insurance company doesn't want the responsibility, they'll refuse to insure your car. If they feel the risk is high, they'll set the price accordingly. That's what insurance agents and underwriters are for.