Problems, Transmission runs very hot and requires all too often oil service. Seems to be common
Struts wore out early. Seems to be common
Friends cam-shaft went in his tribute with a 2.3.
Alternator went recently.
Gas mileage poor.
Mazda rated poor by JD power and associates for reliability

I like the car and have not had a lot of problems. I just expected less problems than my past vehicles that were domestics.