NHTSA Complaint #10990560 — 2017 HYUNDAI TUCSON

THE VEHICLE HAS A DRIVE-BY-WIRE SYSTEM CONTROLLING THE THROTTLE AND THE 7-SPEED DUAL-CLUTCH TRANSMISSION. IN CERTAIN CIRCUMSTANCES, THE THROTTLE PEDAL HAS NO EFFECT ON THE THROTTLE WHATSOEVER. IT HAPPENS MOST IN 'ECO' MODE, BUT STILL HAPPENS IN 'SPORT' MODE, ALWAYS AT A RELATIVELY LOW SPEED (WALKING PACE) OR WHEN ACCELERATING FROM A STOP. THE VEHICLE HAS HAD ONE FIRMWARE UPDATE (AT ABOUT 3K MILES?) WHICH DID MINIMIZE THE PROBLEM SOMEWHAT, BUT DIDN'T ELIMINATE IT. AT 7,900 MILES THE PROBLEM SEEMS TO BE GETTING WORSE, AND THE DEALER SAYS THERE ARE NO NEW FIRMWARE UPDATES THEY ARE AWARE OF. I AM CONCERNED BECAUSE MANY TIMES, WHEN IN SLOW OR STOP-AND-GO TRAFFIC, I'VE NEEDED TO ACCELERATE AND THE VEHICLE SIMPLY WOULDN'T DO IT FOR WHAT FELT LIKE FOREVER, BUT WAS PROBABLY ONLY A SECOND OR TWO. WHEN THE VEHICLE FINALLY DID START TO MOVE, IT JUMPED FORWARD AT FULL THROTTLE. THE SERVICE WRITER AT THE DEALERSHIP SAYS THIS IS A COMMON COMPLAINT, AND THAT OTHER CUSTOMERS HAVE ALSO COMPLAINED, SPECIFICALLY, ABOUT TRYING TO PULL OUT OF THEIR DEALERSHIP ONTO A BUSY STREET AND HAD THEIR VEHICLE SIMPLY REFUSE TO ACCELERATE. ON JUST ONE OCCASION, THE VEHICLE ACCELERATED AT FULL THROTTLE UP TO THE ENGINE'S REDLINE, WITHOUT MY FOOT ON THE THROTTLE! AS BAD AS IT IS, I EXPECT THAT THERE HAVE BEEN ACCIDENTS CAUSED BY THIS PROBLEM.