Toyota enterprise revenue in 2023 was $311B. Q4 of 2023 alone revenue was ~$82B. They will come up with a fix for the v35a and are well positioned financially to afford the fix they decide to deploy or get sued to deploy.
For comparison, they replaced 2nd GEN Tacoma frames as a lawsuit settlement with a cost of $3.4B. My truck was one of those that was replaced and the dealer charged Toyota $15K. Yes, Toyota can provide parts at 'company cost', but the dealer is a separate business entity and gets paid the Toyota warranty labor rate and gets reimbursed for the service loaner I was provided.
Toyota didn't go bankrupt, they didn't stop making 2nd or 3rd gen Tacomas. They paid and moved on and their stock today is up 85% from 5 years ago.
Even if they have to pay $30K each to R&R 200,000 V35a motors that cost is $6B. Toyota will take that $6B of field repairs, add in $100M of design work and cost for in-process parts rework and they will move on and keep making vehicles with V35 variants - Tundras, Sequoias, LX600, 300 Series, Lexus LS and GX550s. They won't abandon multiple platforms/markets due to this cost or this issue.
I also expect they won't want a lingering wound that damages their brand past the immediate problem. So, I believe (and hope) they get a solid fix for their customers and get the production right in a reasonable timeframe.
It will take a while, In all cases it won't break Toyota. I hope they own up, protect the brand and move out to keep customers satisfied. Unfortunately, they are eroding trust right now.
In all cases it will not break Toyota.
Additional comment for clarity of intent - The above is in response to the multitude of social media types proclaiming ‘Toyota is done, Tundra is done, etc’. This is me typing out my opinion here among sane people. Rant over.