2015 Hyundai Sonata power train problems
134 owner complaints filed with NHTSA name the power train on the 2015 Hyundai Sonata — 12% of all complaints for this model year.
What owners report
“In March 2026 Hyundai did an emissions update Campaign 9C2. Since that update my 2015 Hyundai Sonata SE has run rough and shifted hard. Hyundai stopped doing the update in May 2026. Hyundai has not provided any update to fix the problem they created. I am worried the update is damaging the motor…”
filed Sep 10, 2026
“VEHICLE: 2015 Hyundai Sonata, 2.4L Theta II GDI engine Mileage at time of incident: [ 93k Date update performed: June 2026 Dealer/location where update was performed: Fitzgerald Hyundai Gaithersburg, MD DESCRIPTION OF PROBLEM: After my vehicle received the ECM software update issued under Hyundai…”
filed Jul 4, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- Affected vehicles may have been assembled with an incorrect left axle shaft which may…Campaign 14V784000 · Dec 9, 2014
Power Train problems in other Sonata years
| Year | Reports | Share |
|---|---|---|
| 2024 Sonata | 6 | 13% |
| 2023 Sonata | 16 | 19% |
| 2022 Sonata | 24 | 26% |
| 2021 Sonata | 24 | 18% |
| 2020 Sonata | 24 | 13% |
| 2019 Sonata | 8 | 5% |
| 2018 Sonata | 40 | 11% |
| 2017 Sonata | 55 | 7% |
| 2016 Sonata | 59 | 8% |
| 2014 Sonata | 54 | 7% |
| 2013 Sonata | 94 | 5% |
| 2012 Sonata | 97 | 6% |
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.