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 060518 · Service Campaign · issued May 19, 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, 2026Some vehicles may exhibit difficulty starting in cold weather. This bulletin provides the procedure to perform an inspection on the starter magnetic switch for potential freezing and, if necessary, replace the starter…
26-EE-003H TSB · Service Bulletin/Repair Instructions · issued Apr 18, 2026
Electrical System problems in other Sonata years
| Year | Reports | Share |
|---|---|---|
| 2024 Sonata | 17 | 40% |
| 2023 Sonata | 12 | 14% |
| 2022 Sonata | 15 | 16% |
| 2021 Sonata | 16 | 13% |
| 2020 Sonata | 35 | 21% |
| 2019 Sonata | 12 | 8% |
| 2018 Sonata | 60 | 16% |
| 2016 Sonata | 88 | 12% |
| 2015 Sonata | 166 | 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.