2018 Hyundai Sonata engine and engine cooling problems
14 owner complaints filed with NHTSA name the engine and engine cooling on the 2018 Hyundai Sonata — 4% of all complaints for this model year.
What owners report
“The contact owns a 2018 Hyundai Sonata. The contact stated that while driving approximately 60 MPH, the vehicle started to vibrate roughly. The contact felt the vibration in the steering wheel. The check engine warning light was illuminated. The contact slowed down and pulled off the roadway. The…”
filed Jan 9, 2026
“The contact owns a 2018 Hyundai Sonata. The contact stated that while receiving an oil change, the technician advised that the oil level was very low. The contact stated that the low oil warning was intermittently illuminated. The contact was advised to take the vehicle to a dealer to be diagnosed…”
filed Dec 22, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Engine and Engine Cooling problems in other Sonata years
| Year | Reports | Share |
|---|---|---|
| 2023 Sonata | 2 | 2% |
| 2021 Sonata | 1 | 1% |
| 2019 Sonata | 7 | 4% |
| 2017 Sonata | 18 | 2% |
| 2016 Sonata | 16 | 2% |
| 2015 Sonata | 21 | 2% |
| 2014 Sonata | 21 | 3% |
| 2013 Sonata | 40 | 2% |
| 2012 Sonata | 11 | 1% |
| 2011 Sonata | 45 | 1% |
| 2009 Sonata | 6 | 1% |
| 2008 Sonata | 2 | 0% |
Other reported problem areas on the 2018 Hyundai Sonata
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.