 We have a 2013 CX-9.  Since we've owned it the torque converter and new transmission were completely faulty and replaced, the brake booster, lower control arms (and now front ball joint).  The brake booster problem has existed on other Mazda vehicles dating back to 2003 (over 10 years).  in 2012 Government investigated problems of leaking master brake cynlinders of 2008 Mazda CX-9.  NHTSA already investigated the 2010-2011 CX-9's and Mazda "extended the warranty" on those vehicles.  What about the 2013 CX-9's?  Why was the problem not yet remedied on the 2013?  I have COMPLETELY lost confidence in the Mazda brand: brakes, transmission and steering.  It's a great vehicle, but what good is a vehicle if you cannot stop or steer or have power to the transmission?  Safety should be FIRST priority and MAZDA has failed miserably with these issues (especially brakes).  The brake booster was supposedly "fixed" under warranty, The next day the orange wrench mechanic light illuminated on the dashboard and cruise control broke.  It turns out the brake booster was still faulty.  We took it back and they have supposedly "fixed it this time".  This is the 3rd major repair of this vehicle and it is now less than 3 years old!  I do not think I would buy another Mazda again.