There is a Netflix documentary series out called "Dirty Money" , the first episode was about guess what?!
It is an eye opener to say the least, and coming from the land of the free to sue lawyers, what they say is extremely revealing.
Lines like "hundreds of senior managers and engineers would have known" and " the fix will shorten engine life" led to the total recall of all diesels from 2009-2015. (only in the USA) Also interesting the reason they can get away with it in the EU!
And the tests showing 40-80 times claimed emissions on the road, and the actual reasons they did them. Not to stuff with VW but original aim was to promote the "clean tech"!!!!!
But don't mention the monkeys....
https://www.netflix.com/au/title/80118100