Some automakers used to recommend replacement at 10 or 15 years old (my 1999 Mercedes had that on a door-jamb sticker). But from what I've seen, none of them ar

Some automakers used to recommend replacement at 10 or 15 years old (my 1999 Mercedes had that on a door-jamb sticker). But from what I've seen, none of them are saying that anymore. Perhaps there was additional operational-life testing done. Or (more cynically) perhaps the automakers decided that replacing the 8+ airbags a modern car has after it's 15 years old, was something that no one was going to do because the cost would exceed the value of the vehicle by that point.