WHILE DRIVING A LOUD GUN LIKE SOUND HAPPENS. SOUND WILL NOT TURN OFF EVEN WITH THE VEHICLE OFF OR VOLUME TURNED DOWN. THIS ISSUE IS RELATED TO THE BOSE AMP FAILURE WHICH THE DEALERSHIP HAS REFUSED TO FIX FOR FREE OR DIAGNOSE FOR FREE. CONTACTED BOSE AND THEY HAVE CONFIRMED THIS IS A KNOWN ISSUE THEY NO LONGER HONOR AND REFERRED ME TO THE DEALERSHIP. THE MAZDA DEALERSHIP WILL CHARGE $1300 JUST FOR THE AMP ALONE.