When I first bought my brand new Mazda 6 in 2003 I kept getting a burning smell in the car. The Mazda mechanic told me the smell would go away after 3 -5 thousand miles. He said it was something to do with the exhaust pipes.
I can not remember how many times my brakes had to be changed and also just a month before my warranty expired I had to get rust fixed around my back wheel well. Of course they gave me a hard time but they fixed it twice because the first time looked terrible , I could have done better. Needless to say the rust came back with a fury it looks terrible,at least it is only in that one spot (strangely). Also the light cover on my front passenger door never stays on .
The car is fun to drive I like the way it handles!