2021 Kia Seltos fuel/propulsion system problems
23 owner complaints filed with NHTSA name the fuel/propulsion system on the 2021 Kia Seltos — 6% of all complaints for this model year.
What owners report
“After getting recall work done last year regarding SC336 my sensor went off and now my car needs a new engine due to defective heat-treated Piston oil rings causing Catastrophic failure. Kia is declining responsibly because of lack of enough oil changes. They have not proved this failure was from…”
filed Jul 27, 2026
“While in the middle of driving on the highway, the vehicle has powered off then back on. The vehicle “slips” when revving up.”
filed May 25, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Fuel/propulsion System problems in other Seltos years
| Year | Reports | Share |
|---|---|---|
| 2024 Seltos | 1 | 2% |
| 2022 Seltos | 1 | 1% |
Other reported problem areas on the 2021 Kia Seltos
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.