IIRC only belts have a mandated warranty period. Air bags are only covered in the initial bumper-to-bumper. And front bags are required by the government. Not sure about deactivation, but I think there's some law there, too.
Point being, the requirement on TPMS is for the manufacturer to include it. I don't think anyone is going around handing out fines to people with broken tire sensors. Likewise, you're not gonna get in trouble for having your air bag light on.
But I'd still recommend people ATTEMPT to keep these systems working. It never ceases to baffle me how hard some people rail against TPMS.
'I don't need some computer to let me know I've run over a small piece of road debris and punctured a tire, bra. I just know.'
Although I'm still happy to mock people who 'have blowouts.' That's read as: drive on a flat tire until it explodes. Yes, someone with half a brain should be able to tell when one of their tires is damn near completely flat. But that doesn't mean the system is worthless. Personally, I appreciate the early warning. It ain't saving my life...but I appreciate it.
I have no doubt that it HAS saved a lot of lives, though. And some of those retards might have harmed me as their car cartwheeled down the road. So I appreciate that, too.