One problem related to brake pedal and linkage has been reported for the 2012 Mazda CX9. The most recently reported issues are listed below.
The contact owns a 2012 Mazda cx-9. After attempting to engage the brakes, the brake pedal failed to depress. The vehicle was taken to an authorized dealer for further inspection. The VIN was not available. The manufacturer was notified of the failure. The approximate failure mileage was 41,000.