No, it isn’t. The catalytic converter is part of the emissions system, which is not covered by powertrain warranty, full stop. The US federal emissions warranty

No, it isn’t. The catalytic converter is part of the emissions system, which is not covered by powertrain warranty, full stop. The US federal emissions warranty exists precisely because manufacturers refused to cover it under their powertrain warranties. Any who do are an exception. Here’s how you know the distinction: if the catalytic converter fails outright, your engine can’t breathe and loses performance. Your engine doesn’t stop (in most circumstances). Boom, not powertrain, and not covered under powertrain warranty. If this is different elsewhere, it’s different elsewhere, but what you just said is plainly false in the United States. You really should understand that before escalating to an automaker because in this case, you would not have been grounded in facts and I can’t see that call going well at all.