The best and worst Kia Niro years, by the numbers
Short answer: among Kia Niros old enough to judge (2017–2022), the 2021–2022 have the fewest owner complaints per 10,000 sold. No year stands out as having far more complaints than the rest.
We counted every owner complaint filed with the federal government (NHTSA) for each model year and divided by how many were sold that year, so a year that sold more doesn’t look worse just for being popular. Years newer than 2022 are shown but not ranked — they haven’t been on the road long enough. How this is calculated.
Years with the fewest complaints
2021 Kia Niro · 3.4 per 10,000 sold (0.2× this model’s typical year)
Most-reported, even so: Wiring harness, grounds and connectors.
2022 Kia Niro · 10.6 per 10,000 sold (0.5× this model’s typical year)
Most-reported, even so: Master cylinder and booster.
Every year: complaints per 10,000 sold
Typical Kia Niro year: 21.1 per 10,000 sold.
Complaints are counted once each, even when an owner lists several parts. Sales are US units sold in the calendar year, a close stand-in for the model year.
Common questions
What is the worst year for the Kia Niro?
No Kia Niro year from 2017–2022 has far more complaints per 10,000 sold than the rest.
What is the best year for the Kia Niro?
The 2021 has the fewest owner complaints per 10,000 sold among Kia Niros from 2017–2022: 3.4, against 21.1 for a typical year. The 2022 is also well below typical.
Why aren't the newest Kia Niro years ranked?
The 2023–2026 haven't been on the road long enough. Newer cars have fewer complaints mainly because they're newer, so ranking them would flatter them.
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Source: NHTSA owner complaints and recalls; US sales from public industry figures. Complaints are self-reported and not independently verified. This is not an inspection and not a recommendation to buy or avoid any vehicle.