2018 Hyundai Tucson fuel/propulsion system problems
22 owner complaints filed with NHTSA name the fuel/propulsion system on the 2018 Hyundai Tucson — 6% of all complaints for this model year.
What owners report
“This vehicle had a engine replaced by the dealership Nov 2024.Has not run the same since.Getting worse and seems like transmission issues.I was told The first and the 2nd owner which I'm the 2nd owner has a 5 year 100,000 mile warranty.It's been 4 years and since I've had the vehicle I've driven…”
filed May 30, 2026
“UNKNOWN -A catalytic converter clogged after being installed - only 14 months following installation, causing rough and unsafe acceleration, inability to shift gears properly, and need to drive with hazards on. It is clear that there is an issue with the engine/exhaust and system in this vehicle…”
filed May 19, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Fuel/propulsion System problems in other Tucson years
| Year | Reports | Share |
|---|---|---|
| 2025 Tucson | 1 | 0% |
| 2024 Tucson | 6 | 7% |
| 2023 Tucson | 16 | 13% |
| 2022 Tucson | 128 | 35% |
| 2021 Tucson | 8 | 11% |
| 2020 Tucson | 4 | 2% |
| 2019 Tucson | 24 | 6% |
| 2017 Tucson | 75 | 7% |
| 2016 Tucson | 55 | 3% |
| 2015 Tucson | 12 | 5% |
| 2014 Tucson | 6 | 3% |
| 2013 Tucson | 6 | 2% |
Other reported problem areas on the 2018 Hyundai Tucson
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.