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Kia K5 Problems

The Kia K5 replaced the Optima nameplate in 2021, bringing bold styling and updated technology to the midsize sedan segment. With 1,098 complaints and 14 reported fatalities, the safety record warrants attention for prospective buyers. The K5 offers compelling value with strong features and competitive pricing. As a relatively new model, long-term reliability data is still developing.

1,098
Total Complaints
19
Total Recalls
6
Model Years
14
Reported Deaths
✓

Best Years

These years have the fewest reported problems.

2024 2025 2026

Common Problem Categories

Fuel/propulsion System 154
Electrical System 136
Engine 122
Unknown Or Other 120
Power Train 96

Complaints by Model Year

All Model Years

Year ↓ Complaints Recalls Crashes Fires Rating
2026 2 0 0 0 Good
2025 74 2 10 0 Good
2024 54 2 2 0 Good
2023 214 4 16 0 Average
2022 362 5 56 16 Below Average
2021 392 6 16 6 Below Average

Kia K5 Years to Avoid

The 2021 Kia K5 has accumulated the most complaints as the first year of this new model. Engine issues including stalling and loss of power have been reported at concerning rates. The 1.6L turbo engine has shown more problems than the 2.5L naturally aspirated option. Electrical system glitches affecting various vehicle functions have frustrated owners. Some owners report transmission hesitation and rough shifting with the 8-speed automatic. The 14 fatalities in the database, while requiring context, suggest careful consideration of safety features and driving conditions.

Best Kia K5 Years

The 2026 Kia K5 represents the best year to buy, with Kia having addressed early production issues over multiple model years. The 2024 and 2025 models also show improved reliability as manufacturing matured. Later production benefits from supplier refinements and software updates addressing early problems. These newer models offer the best balance of features, refinement, and dependability.

Frequently Asked Questions