2015 Hyundai Sonata engine and engine cooling problems
21 owner complaints filed with NHTSA name the engine and engine cooling on the 2015 Hyundai Sonata — 2% of all complaints for this model year.
What owners report
“The contact owns a 2015 Hyundai Sonata. The contact stated that the vehicle was taken to a local dealer who performed an emission software upgrade. Later, while driving, the air conditioner blew hot air, the thermostat increased to high, and an engine overheating warning message was displayed on…”
filed Jul 9, 2026
“The contact owns a 2015 Hyundai Sonata. The contact stated that while operating the vehicle, exhaust fumes were noticed inside the cabin, and the check engine light illuminated before the engine stalled. The vehicle was towed to a local dealer. The cause of the failure was not determined. The…”
filed Jul 9, 2026
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% |
| 2018 Sonata | 14 | 4% |
| 2017 Sonata | 18 | 2% |
| 2016 Sonata | 16 | 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 2015 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.