2017 Hyundai Sonata electrical system problems
65 owner complaints filed with NHTSA name the electrical system on the 2017 Hyundai Sonata — 9% of all complaints for this model year.
What owners report
“I was driving and all of a sudden the traction lights turned on and the sterring wheel is hard to turn. Almost go in a car accident. The windows just stopped working and the brakes light constantly keep getting burned out.”
filed Jul 25, 2026
“I am writing to report a direct violation of the Theta II Class Action Settlement terms by Hyundai Motor America. This morning , I emailed an Executive Case Manager explicitly explaining that my 2017 Sonata has an active P1326 code, has the 2019 KSDS update, and requires a mandatory diagnostic…”
filed Jul 21, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- Smart Junction Box (SJB) software logic may not properly interpret the signals received…Campaign 21V749000 · Sep 24, 2021
Related service bulletins
Certain Santa Fe (TMA), Santa Fe Sport (AN), Sonata (LFA), and Tucson (TL) vehicles equipped with Theta II engines may exhibit elevated engine-out emissions. This bulletin provides instructions for updating the Engine…
26-01-013H-2 TSB · Service Campaign · issued May 21, 2026Following completion of Service Campaign 9C2 (Theta II Emissions Improvement), certain vehicles may exhibit a brief hesitation or rough shifting condition during cold start operation. If present, this condition is…
9C2 DCS 260518 · Service Campaign · issued May 19, 2026
Electrical System problems in other Sonata years
| Year | Reports | Share |
|---|---|---|
| 2024 Sonata | 18 | 39% |
| 2023 Sonata | 12 | 14% |
| 2022 Sonata | 15 | 16% |
| 2021 Sonata | 17 | 13% |
| 2020 Sonata | 40 | 22% |
| 2019 Sonata | 12 | 7% |
| 2018 Sonata | 60 | 16% |
| 2016 Sonata | 89 | 12% |
| 2015 Sonata | 167 | 15% |
| 2014 Sonata | 135 | 18% |
| 2013 Sonata | 260 | 14% |
| 2012 Sonata | 234 | 15% |
Other reported problem areas on the 2017 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.