2018 Hyundai Sonata — Problems & Complaints

- Component or system that failed: engine (cylinder #4 misfire) - Safety was put at risk twice: once when knock sensor went off on interstate (October) and engine went into limp mode (aka protection mode). Required a tow from the, which was tricky with a vehicle full of passengers. Safety was put at risk gain when vehicle began to stutter/sputter on interstate (December). Drov…

THE CAR BUCK GOING THREW LIGHTS IT HAD NO POWER. IT WOULD BOG DOWN WHEN YOU LEASE EXPECT IT. THIS DOESN'T ALWAYS HAPPEN. BUT ONCE HAPPEN AT 1:30AM. THE LIGHT BEEN ON FOR AWHILE. I GO THREW A GREEN LIGHT THE CAR WENT LIP AND THE SEMI LAID ON HIS HORN AT 1:30AM. BECAUSE HE DIDN'T KNOW I BEEN HAVING THIS PROBLEM FOR MONTHS.THE NEXT MORNING I WENT TO THE DEALER JUST AS THEY GOT T…

THE HEADLIGHTS ON MY 2018 HYUNDAI SONATA LIMITED HAVE CONDENSATION IN THEM. IT HAS BEEN THERE FROM THE DAY I BOUGHT THE CAR ON 10/1/18. THAT DAY THE DEALERSHIP TOOK PICTURES TO SEND TO HYUNDAI AND 1 MONTH LATER REPLACED THE HEADLIGHTS. BUT THE NEW HEADLIGHTS WERE WORSE THAN THE ORIGINAL AND THE DAY AFTER THEY WERE INSTALLED I RETURNED TO THE DEALERSHIP WHERE THE PARTS MANAGER …

When my car suddenly stopped on the highway, I encountered an issue with the “body control module.” The car wouldn’t start, and the key fob was ineffective. Additionally, the airbags stopped working. I don’t recall all the details, but I was unsure of where to report the dangerous vehicle. I’ve noticed several other Hyundai owners complaining about this issue, where their cars…

Intermittent no-crank, no-start condition. Dash lights illuminate, push-button start produces no response. Brake pedal applied. Vehicle becomes immobilized without warning. I’ve been stranded on multiple occasions. Unable to commute to work, or home. Most recently on December 19,2025 the car completely shut off while driving on the highway.