2011 INFINITI EX35 Engine Problems

THIS CAR HAD AN UNEXPLAINED EPISODE OF SUDDEN ENGINE POWER LOSS AND DECELERATION FOLLOWED BY ENGINE SHUTDOWN AND TEMPORARY INABILITY TO RESTART THE ENGINE. WHILE TRAVELING AT APPROXIMATELY 60 MPH ON A SLIGHTLY INCLINED HIGHWAY, I SUDDENLY FELT THAT THE CAR NEEDED TO DOWNSHIFT BUT IT WAS NOT DOING SO. AS I CONTINUED TO EXERT ADDITIONAL PRESSURE ON THE ACCELERATOR, THE CAR BEGAN TO NOTICEABLY AND QUICKLY LOSE ENGINE POWER. THE POWER STEERING AND POWER BRAKES WORKED NORMALLY, AND I WAS ABLE TO PULL OFF THE ROAD, BY WHICH TIME THE ENGINE HAD STOPPED RUNNING. I ESTIMATE I TRAVELED APPROXIMATELY ONE HALF MILE FROM THE FIRST SIGN OF TROUBLE. THERE WERE NO UNUSUAL SOUNDS OR ODORS. IF ANY WARNING LIGHTS CAME ON, I DID NOT NOTICE THEM. ACCESSORY ITEMS SUCH AS THE RADIO, AIR CONDITIONING, NAVIGATION SYSTEM, AND POWER WINDOWS STILL OPERATED. I TRIED SEVERAL TIMES UNSUCCESSFULLY TO RESTART THE...