2020 Hyundai Sonata power train problems
24 owner complaints filed with NHTSA name the power train on the 2020 Hyundai Sonata — 13% of all complaints for this model year.
What owners report
“I am submitting a safety complaint regarding a recurring, unresolved electrical defect in my 2020 Hyundai Sonata SEL. The vehicle fails to recognize when the ignition is switched off, leaving core vehicle systems active and causing severe parasitic battery drain that leaves the car immobilized…”
filed Sep 3, 2026
“My vehicle while driving, it is jerking and shaking. When I come to a stop, the cars rpms go up and down while the car is shaking. When I pressed the gas pedal to accelerate the car will not accelerate as normal and the car jerks as I’m driving it. The RPMs rev up and down without any pressure…”
filed Jul 10, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
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% |
| 2019 Sonata | 8 | 5% |
| 2018 Sonata | 40 | 11% |
| 2017 Sonata | 55 | 7% |
| 2016 Sonata | 59 | 8% |
| 2015 Sonata | 134 | 12% |
| 2014 Sonata | 54 | 7% |
| 2013 Sonata | 94 | 5% |
| 2012 Sonata | 97 | 6% |
Other reported problem areas on the 2020 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.