2021 Kia Niro Engine Problems
- Complaints
- 2about this part
- Share
- 22%of 9 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the engine of the 2021 Kia Niro, 22% of the 9 complaints for this model year.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I received important safety recall letter for NHTSA recall # 23V534. the HCA & or Fuse might need to be replaced . I brought the 2021 Nero to my local Kia dealership, Eagle kia ,Riverhead NY on January 18th. The dealership still has the vehicle & claims that a code came up when they did the diagnostics That requires a part that must be secured to complete the fix for the recall. they claim they are awaiting approval from kia corporate & NHTSA to add to the technical bulletin. But their is no timeframe they have or when this additional part will be available. …”
NHTSA complaint #11570590, filed 2024-02“EV motor and drive train have a clattering noise, much like a playing card attached to a bicycle clattering against the wheel spokes. it speeds up and slows down with the acceleration of the motor.”
NHTSA complaint #11725753, filed 2026-03Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 2 | 12% |
| 2024 | 2 | 20% |
| 2023 | 4 | 9% |
| 2022 | 6 | 19% |
| 2021 | 2 | 22% |
| 2020 | 9 | 23% |
| 2019 | 10 | 18% |
| 2018 | 17 | 28% |
| 2017 | 29 | 35% |
Other parts of the 2021 Kia Niro
3 complaintsElectrical system
2 complaintsOther or unknown
2 complaintsVisibility (wipers, defrost, mirrors)
2 complaintsVehicle speed control
1 complaints
← All problems reported for the 2021 Kia Niro
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology