If your car was stuck in a flood, they wouldn't cover it either brand new or not.

But, of course, it was not stuck in a flood. It was used under perfectly normal and expected conditions and circumstances. Some error in material or workmanship caused this failure. Not covering it under warranty may be Toyota/Lexus policy, but if so, it's a bad policy.

I doubt there is a single manufacturer that would cover this under warranty. I had it with a six month old Hyundai years ago. No dice.

Is there a write-up somewhere that would show us how to check the drain hose? Seems it would be a good preventative maintenance measure to do regularly, especially if it's fairly easy to do.

Lots of YouTube videos online. But I didn’t find a 4th Gen.

https://m.youtube.com/watch?v=XQmwHPl-Kkw

Thanks, but I should have clarified the AC drain hose. I already know about the sunroof drain locations...

Sorry, typed Sunroof

https://m.youtube.com/watch?v=XQmwHPl-Kkw

I think it will be good idea when Im servicing the car next time to tell dealership to make sure all drains are cleaned.

Doesn't look like a simple thing to do and since it's only happened to me once in roughly the last 30 years, I'll take my chances

I had that happen to one of my wife's cars years ago, a piece of wire pushed up the hose cleared it out. I would try to use a wire or wet vac instead of blowing. I imagine you may just push the debris up and out of the way to drain it, but, it may just clog again if the debris is not removed when it starts dripping. I use a wet vac on my home AC condensate drains periodically and you'd be suppressed how much crap comes out.

Doing a Google search. I found this Service Bulletin for the NX.

MC-10131864-9999.pdf (nhtsa.gov)

The repairs includes installing a hose tip that contains a pesticide.

The ARINIX® Tip contains permethrin, a pesticide, as the active ingredient.

I have two condensors for the home AC and know exactly where each one drains so the red flag will wave if I ever DON'T see the water draining.

Thank you sir!

Update: 2nd estimate from the adjuster came at >$7K and insurance agreed to pay. The dealership is waiting for the parts to arrive to get the car fixed. Finger crossed to get the car back before thanksgiving.

Last update: the car is back from the body shop just before thanksgiving. The insurance covered all the cost (minus the deductible). Glad to have the car back.