This page covers 1 recall, 366 owner complaints, NHTSA crash-test ratings and EPA fuel economy for the 2018 Hyundai Sonata.
26–41 mpg combined
5.7–9 L/100km
Large Cars
Fuel economy data from fueleconomy.gov (EPA / U.S. Dept. of Energy). Annual cost based on 15,000 mi/yr at 55% city driving and current fuel prices. MPG is U.S. gallons; L/100km converted. Ranges reflect the 4 tested variants for this model year.
5/5 Overall
NHTSA 5-Star Safety Rating
Engine complaints dominate the 2018 Sonata's complaint record by a wide margin. The most common theme is excessive oil consumption, with owners reporting that the 2.4-liter engine burns through oil at a rate that requires adding oil frequently between scheduled changes. Many describe this happening despite regular maintenance, and some note the problem persists even after partial repairs. A smaller but consistent group of powertrain complaints covers hesitation and stalling, where the engine loses power intermittently, often when merging or accelerating into traffic, without triggering a warning light. Exterior lighting complaints form the third cluster, though at lower volume. A handful of owners also describe brake shudder and grinding when stopping from highway speeds, occasionally accompanied by warning lights related to the anti-lock brake system. The oil consumption pattern is by far the most frequently raised issue across this model year's complaint filings.
366
Total Complaints
18
Crash-Related
12
Fire-Related
10
With Injuries
By System
At a glance
What can fail
The trunk latch can become damaged, which may prevent you from opening the trunk from inside the vehicle.
What the fix does
Dealers will replace the trunk latch base at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
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Driver Assistance
Ratings from NHTSA's New Car Assessment Program (NCAP).
Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database. See trending complaints →
