NHTSA Complaint #11132911 — 2012 HYUNDAI SONATA

AFTER DRIVING FOR A FEW MINUTES ON HIGHWAY, MY 2012 SONATA HYBRID WILL START TO JUMP AND BUCK. IT SLOWLY LOSES POWER AND WHEN IT REACHES LOWER SPEEDS (UNDER 40 MPH) AS I TRY TO ACCELERATE IT WILL FEEL LIKE IT'S TRYING TO CATCH THE NEXT GEAR BUT WON'T. I WILL CONTINUE TO LOSE POWER SO I HAVE TO TRY TO LEAVE HIGHWAY OR PULL OVER, WHICH CAN BE DANGEROUS ON A HIGH SPEED ROAD. IT HAS HAPPENED THREE TIMES SINCE AUGUST 2018. JUST TOOK BACK TO DEALERSHIP BUT FIRST TWO TIMES THEY SAID THEY COULD NOT REPLICATE PROBLEM WHILE TEST DRIVING IT AND ALL DIAGNOSIS INDICATED THE CAR IS FINE. I SEE IN SOME WEB SITES THAT OTHER USERS NATION-WIDE HAVE HAD THE VERY SAME PROBLEM BUT WITH NO RESOLUTION AT HAND. THIS IS A VERY CONCERNING SAFETY ISSUE AS THE LAST TIME IT HAPPENED THE CAR BEHIND ME ALMOST RUN INTO ME AS MY CAR LOST POWER AND SPEED RAPIDLY AND STARTED TO BUCK/STUTTER.