2004 Chevrolet Cavalier LS 4dr Sedan (2.2L 4cyl 5M)
I researched this car to death before purchasing a 2004 model in 2005. I read all sorts of positive notes on it, kind of like here. Let me tell you it was the biggest piece of junk I've ever owned! Everytime I turned around there was something wrong with it. Engine light always came on, had problems with the brakes, trunk wouldn't open anymore, headlight quit working, just to name a few. I only put 26,000 miles on it, so it's not like it had a lot on it.
You already made improvements—you stopped making them!