2018 Hyundai Sonata fuel/propulsion system problems
31 owner complaints filed with NHTSA name the fuel/propulsion system on the 2018 Hyundai Sonata — 8% of all complaints for this model year.
What owners report
“My car stalls while driving and then I try to restart it but nothing happens. After reading online about the fuel pump issues and extended warranty related to the fuel pump I took the car in for repair. My car has 75,000 miles and the extended repair on this is for 150,000 miles/15 years. The…”
filed Sep 4, 2026
“Engine blown out malfunction took two dealer Hyundai Folsom Lake stated rings are bad sludge buildup in engine and stayed at Hyundai motor America denied engine replacement due to knowledge under Theta two engine extended warranty settlement of 150,000 MI 15 years I'm still within warranty but are…”
filed May 12, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Fuel/propulsion System problems in other Sonata years
| Year | Reports | Share |
|---|---|---|
| 2024 Sonata | 1 | 2% |
| 2023 Sonata | 37 | 43% |
| 2022 Sonata | 22 | 24% |
| 2021 Sonata | 20 | 15% |
| 2020 Sonata | 45 | 25% |
| 2019 Sonata | 12 | 7% |
| 2017 Sonata | 33 | 4% |
| 2016 Sonata | 33 | 5% |
| 2015 Sonata | 75 | 7% |
| 2014 Sonata | 49 | 7% |
| 2013 Sonata | 134 | 7% |
| 2012 Sonata | 99 | 6% |
Other reported problem areas on the 2018 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.