Hyundai Sonata Hybrid owners have reported a total of 768 problems for their cars built in the 12 model years listed in the chart below. The chart shows the number of problems reported across all service years for each given model year of the Hyundai Sonata Hybrid. The 2012 Hyundai Sonata Hybrid cars have the most problems reported (203 problems).
The following chart shows the 25 most common problems for Hyundai Sonata Hybrid cars. The number one most common problem is related to the vehicle's engine and engine cooling (229 problems). The second most common problem is related to the vehicle's electrical system (122 problems).
It would not be fair to compare the Hyundai Sonata Hybrid of an older model year to newer model years since older vehicles have been in service longer and thus are expected to have more problems. In order to compare the reliability across Sonata Hybrid model years, we use the PPMY index which is defined as the problems reported per thousand vehicles per Year. A smaller PPMY index indicates greater reliability of the given model year cars.
PPMY = P / S / Y * 1000,
where P = total problems reported during the life of a Hyundai Sonata Hybrid model year; S = total units sold of the model year; Y = years since the debut of the model year (the age of the vehicle).
The results are shown in Table 3.
Another way to measure the reliability across the model years of the Hyundai Sonata Hybrid is to use the total number of problems reported during the vehicle's first year in service, as shown in the Table 4.
| Model Year | Problems Reported |
|---|---|
| 2018 Sonata Hybrid | |
| 2017 Sonata Hybrid | |
| 2016 Sonata Hybrid | |
| 2015 Sonata Hybrid | |
| 2014 Sonata Hybrid | |
| 2013 Sonata Hybrid | |
| 2012 Sonata Hybrid |