From the day i purchased my cx7 the brakes were not working properly and the air conditioner made loud banging noises and does not get cold. when i was at my wits end and took cx7 to dealer at 9,600 miles mazda said i had a bad master cylinder and replaced it. when the master cylinder was replaced my check engine light came on. mazda ordered another master cylinder and a brake booster. when these were replaced my check engine light came on again. mazda said my engine was running on a lean mixture and corrected this. the check engine light is off cx7 runs very roughly. only use premium gasoline and synthetic motor oil. mazda field representative advised me and dealer that loud noise from air conditioner is normal and typical of all similar mazda vehicles. i have this documentation regarding a/c in writing from mazda. air conditioner barley gets car cool, is ineffective when temperature is ninety degrees. my brakes are slightly better, but still low and soft. cx7 runs extremely rough and is getting very poor gas mileage. *tr