2017 Exhaust System replacement/TSB issued

Same thing happened to me a few months ago at 190,000 miles on my 2017 Four. Coolant leaking somewhere in the catalytic converter, which was replaced - $2100. Did not try to get reimbursed. Yes, expensive repair, but my five years of ownership so far has been waaaay cheaper than any other car I've owned.

 

Sorry to hear this and I hope you get some joy out of Toyota regarding a refund. I’m at 102k (literally just out of UK warranty) and having issues. Was your coolant literally empty? Did it leak out suddenly or was it a gradual thing? Mine is slowly draining after a recent breakdown 2016 - complete power loss / breakdown | PriusChat

 

I think mine was a leak over some weeks. I had the car serviced at the dealer 6 weeks before and they didn't say anything about low coolant. I was not in the habit of periodically checking it. But in the few weeks prior, I could sometimes hear water gurgling 'somewhere'. But no warning, and car was acting completely normal. When I the dash light came up and I realized there was a problem, the coolant was empty, I was 900 miles from home, and in Ohio where I was, it was sub-freezing and a winter storm. So I just opted to have them fix it immediately* rather than fill the coolant, go on my way, and watch/wait. It would be nice if the car would give you a warning when the tank is like half empty or 25% full, etc.

*immediately = wait 2 days for them to get the catalytic converter from 300 miles away because there is a severe shortage of this part in the USA.