Ralph Nader was a communist in lust with Big Government; "Consumer Reports" magazine was a purveyor of crap reviews conducted and written by people who didn't know WTF they were doing.
Also, Ralph Nader prevented President Gore (accidentally).
Consumer Reports establishes their ratings by polling the people that subscribe to their magazine or online subscription service.
They send out an extensive 10+ page survey. I have filled it out several times when I was a subscriber. This is how they end up rating Toyota and Lexus as the most trouble free.
This is also how they consistently rate Land Rover, Chrysler and Jaguar at the bottom in reliability.