Right now all this brings to mind for me is the Ford Focus I just bought and finding out about all the info on the problems with the dct transmission on the Focus 2014 - 2016.
Yea i owned a expensive Toyota Supra turbo only to find out AFTER i blew the engine that there was a flaw in the engine build.
the head gasket failed, turned out over the course of the SIX years of that models production the head bolts were not torqued enough.....all i had to do was tighten the bolts....oh, well.
Sad part is i actually had the valve covers off to replace those rotted gaskets.....ugh
The internet was young back then...i wish that i knew.
Toyota never took any blame..