There are 6 owner-reported fuel system complaints for the 2019 Hyundai Konain NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
The fuel system appears to have a small leak from either a bad seal or a problem fuel line.
One day after I filled my gas tank, I noticed a strong gasoline smell outside the car. The next morning, I noticed a huge puddle on the pavement under the fuel tank. At least a gallon of gasoline must have leaked out overnight while the car was parked. I also noticed that gasoline continued to drip down from the fuel tank to the ground. I then had the car towed to the mechanic and they discovered a crack in the mounting flange on the top of the plastic fuel pump. The car was not in a collision and there was no external force that could have caused the fuel pump to crack and leak.
engine light began flashing while driving. Stopped vehicle and turned off engine. Vehicle would not restart. Mechanic says there is no compression and I need a new engine. I contacted the manufacturer who advised my engine was subject to recall but since I am a second owner and the first owner did not get the engine replaced there is nothing I can do.
DELAYS IN ACCELERATION, NOT CHANGING GEARS PROPERLY. SOMETIMES WHEN ACCELERATING THE VEHICLE WILL JUST REV THE ENGINE LIKE ITS IN NEUTRAL. ACCELERATION DELAYS VERY SCARY WHEN MERGING, ACCELERATING FROM FULL STOP AND PASSING. BOUGHT APRIL 2019.
LITTLE TO NO ACCELERATION WHEN GAS PEDAL IS DEPRESSED WHILE IN MOTION. LOSS OF POWER WOULD SUDDENLY OCCUR. TRANSMISSION WOULD NO LONGER SHIFT PROPERLY. THIS HAS OCCURRED TWICE SINCE NEWLY PURCHASED MAY 31, 2019. FUEL INJECTOR WIRING HARNESS WAS REPLACED AFTER THE FIRST OCCURRENCE. PROBLEM COULD NOT BE DUPLICATED AFTER THE SECOND OCCURRENCE.
ONCE IN A WHILE WHEN YOU STEP ON GS PEDAL THE CAR DOES NOT GO FOR ABOUT 3 SECONDS,VERY DANGEROUS WHEN ENTERING HIGHWAY IN FRONT OF TRAFFIC.ENGINE OR TRANSMISSION DOES NOT ACT OR SOUND FUNNY JUST SEEMS LIKE FUEL SYSTEM DOES NOT KNOW GAS PEDAL HAS BEEN PUSHED.HAPPENS ONLY WHEN YOU STOP TO TURN AND START TO GO AGAIN ON STREET OR HIGHWAY. TOOK IT TO RICK CASE HYUNDAI IN WESTON FLORIDA THEY SAID AJUSTED TRANSMISSION BUT DID NOT FIX PROBLEM,STILL DOING SAME THING EVERY NOW AND THEN. IT HAS HAPPENED ABOUT 15 TIMES SINCE I BOUGHT CAR 3 WEEKS AGO IN EARLY DECEMBER 2018.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026