2018 Kia Niro engine problems
16 owner complaints filed with NHTSA name the engine on the 2018 Kia Niro — 29% of all complaints for this model year.
What owners report
“On April 21, 2026, Go Kia Renton performed an oil change on my 2018 Kia Niro Touring (VIN). The car was in perfect condition just two weeks earlier — North Seattle Transmission did a full service on April 6, 2026 at 283,649 miles with no issues noted. Later that night while driving, the red oil…”
filed May 4, 2026
“Just before Hurricane Helene, I brought my 2018 Kia Niro Hybrid to Asheville Kia (NC) after noticing coolant loss and white smoke coming from the exhaust. The dealership charged me $1,400 for a repair involving new gaskets and the EGR cooler. Within a month, the same symptoms returned. I returned…”
filed Sep 21, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA/KAPPA ENGINES - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar…
TSB_ENG222_R8 · Service Bulletin/Repair Instructions · issued Apr 3, 2025TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA/KAPPA ENGINES - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar…
TSB_ENG222_R7 · Service Bulletin/Repair Instructions · issued Feb 28, 2025
Engine problems in other Niro years
| Year | Reports | Share |
|---|---|---|
| 2023 Niro | 4 | 10% |
| 2022 Niro | 5 | 17% |
| 2020 Niro | 8 | 22% |
| 2019 Niro | 10 | 19% |
| 2017 Niro | 28 | 36% |
Other reported problem areas on the 2018 Kia Niro
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.