hi i have a 2010 mazda cx 7 with out the bose system and i changed the factory headunit to a kenwood dnx 6980 i bought everything from crutchfield.com they give u all the install gears free including dash kits and what ever else you may want or need
i am i have the same problem did your mazda dealer say it was a manufactures problem and is it covered under warranty my reason for double checking is becuase the place i bought my cart from they are all ass wholes and they would probably tell me i did something to the brakes