2018 Hyundai Sonata: Reliability Data

Source: NHTSA — 519 complaints
519
Total Complaints
19,862mi
Median Mileage
ENGINE
Top Issue
26
Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

5,987 25th Percentile
19,862 Median Mileage
58,500 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ENGINE
196
UNKNOWN OR OTHER
56
ELECTRICAL SYSTEM
55
POWER TRAIN
35
FUEL/PROPULSION SYSTEM
25
EXTERIOR LIGHTING
21
VEHICLE SPEED CONTROL
17
SERVICE BRAKES
13
ENGINE AND ENGINE COOLING
11
STRUCTURE:BODY
11

Severity Assessment

26
Crashes
18
Fires
28
Injuries
1
Deaths

Sample Complaint Reports

"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 ..."
"WAS DRIVING A BRAND NEW HYUNDAI SONATA 2018 VEHICLE FOR A WEEK WITH 300 MILES ON IT AND WAS ABOUT TO EXIT ON A FREEWAY RAMP, BUT SUDDENLY LOST CONTROL OF THE STEERING. THE VEHICLE HAD TO BE TOWED AND WHEN THE MECHANICS AT THE HYUNDAI DEALERSHIP TOOK A LOOK AT THE VEHICLE, THEY WERE UNSURE OF HOW THE..."
"THERE IS A BLACK LINE ACROSS THE ROAD WITH TWO BUMPS IN IT WHEN YOU ARE DRIVING AT NIGHT.IT ALSO SEEMS THAT THERE IS LIMITED FIELD OF VISION COMPARED TO MY OTHER CAR.ALSO THE HEADLIGHTS FOG UP INSIDE OCCASIONALLY. BROUGHT IT IN TO DEALER, THEY SAID NOTHING IS WRONG.IT OCCURS WHEN DRIVING THE CAR,WHE..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28