Last updated: 2026-08-24
KIA Optima Reliability by Year
The KIA Optima averages 71/100 across 3 model years, rated good.
KIA Optima Reliability Overview
The KIA Optima, specifically from the 2018-2020 model years, shows an average reliability score of 71/100, categorized as "Good" on the Auto Reliability Index scale. Commonly reported issues include engine problems such as excessive oil consumption and rod bearing failures, which are more frequent in models with the Theta II engine, alongside electrical system malfunctions and powertrain concerns. Despite these challenges, the Optima maintains a medium reliability rating with an estimated annual repair cost of $471, which is below the midsize car average, making it a consideration for those prioritizing lower maintenance expenses.
U.S. sales were 101,603 in 2018, 96,050 in 2019, and 48,484 in 2020 before Kia replaced the Optima nameplate with the K5. These model-specific figures are used for historical context; the 2021 row is a source-table artifact and is not treated as a meaningful Optima sales year.
Current generation: 5th gen (2021–2023), facelifted 2025.
Best & Worst KIA Optima Years
Comprehensive reliability analysis based on NHTSA data, owner complaints, and historical performance.
Best KIA Optima Years to Buy
Based on reliability index scoreThe best KIA Optima year is 2020 with a reliability score of 72/100, rated good. Other strong picks include 2019 (72/100) and 2018 (70/100).
KIA Optima Years to Avoid
No KIA Optima years are statistical outliers in our data.
All model years score consistently well. The KIA Optima maintains one of the highest industry standards for long-term durability across its entire production span.
KIA Optima Reliability Score Trend
KIA Optima reliability has remained consistent across model years, averaging 71/100.
Scores 0–100. Higher is better.
| Year | Score | Rating |
|---|---|---|
| 2018 | 70/100 | Good |
| 2019 | 72/100 | Good |
| 2020 | 72/100 | Good |
Year-by-Year Reliability
2020 KIA Optima
0 recalls · 138 complaints
The 2020 KIA Optima has good reliability. There are 0 recalls and 138 owner complaints on file for the 2020 KIA Optima. Severity signals include 6 crash-related complaints and 2 fire-related complaints. The most commonly reported problem areas are: Engine (60), Power Train (24), Unknown Or Other (11).
2019 KIA Optima
1 recalls · 205 complaints
The 2019 KIA Optima has good reliability. There are 1 recall and 205 owner complaints on file for the 2019 KIA Optima. Severity signals include 20 crash-related complaints and 6 fire-related complaints. The most commonly reported problem areas are: Engine (58), Unknown Or Other (30), Electrical System (18).
2018 KIA Optima
2 recalls · 230 complaints
The 2018 KIA Optima has good reliability. There are 2 recalls and 230 owner complaints on file for the 2018 KIA Optima. Severity signals include 10 crash-related complaints and 10 fire-related complaints. The most commonly reported problem areas are: Engine (90), Electrical System (27), Unknown Or Other (22).
Found Your KIA Optima? Check Its History
Every KIA Optima has a different past. Before you buy, a VIN check reveals hidden accidents, title problems, and open recalls.
- Accidents
- Open Recalls
- Title History
- Odometer Rollback
KIA Optima Repair Costs
Reliability Rating
4/5
Annual Repair Cost
$471
Repair Frequency
0.2/yr
Major Repair Risk
12%
$55 below the midsize cars average of $526/yr.
Ranked #8 of 24 among midsize cars.
KIA Optima Resale Value
The KIA Optima is estimated to retain about 55.1% of its original value after 5 years, based on observed used-car listings.
- Value Retained
- 55.1%
- Depreciation
- 44.9%
- Listings Analyzed
- 290
after 5 years
over the same period
U.S. used-car listings
Listings observed in . This is a historical market benchmark, not a current price quote.
Explore KIA Optima depreciation and resale value on CarResaleValue.comKIA Optima Years to Avoid
See which model years have the most problems
Most Reliable KIA Models
Compare all KIA models by reliability
Compare KIA Optima With Similar Sedans
The KIA Optima competes with other midsize sedans such as Hyundai Sonata, Toyota Camry, and Honda Accord.
Hyundai Sonata reliability
9 years tracked · 1050 complaints
Toyota Camry reliability
9 years tracked · 1604 complaints
Honda Accord reliability
9 years tracked · 3503 complaints
Nissan Altima reliability
9 years tracked · 741 complaints
Chevrolet Malibu reliability
8 years tracked · 1193 complaints
Frequently Asked Questions
- Is the KIA Optima reliable?
- The KIA Optima has good reliability with an average score of 71/100. Some model years are stronger than others — check individual years before buying.
- What is the best year for the KIA Optima?
- The best year for the KIA Optima is 2020 with a reliability score of 72/100, rated good. It has 0 recalls and 138 owner complaints on record. See full 2020 KIA Optimaanalysis →
- What are the KIA Optima years to avoid?
- No KIA Optima years in our database are statistical outliers — all tracked model years score consistently within the model average. See full years-to-avoid analysis →
- How much does it cost to maintain a KIA Optima?
- The KIA Optima has an estimated annual repair cost of $471, which is $55 below the midsize cars average of $526. This includes both scheduled maintenance and unscheduled repairs based on independent repair data.
How We Calculate Reliability Scores
Auto Reliability Index scores are calculated on a 0–100 scale using a weighted formula that combines multiple public data sources. Each factor is weighted based on its predictive value for real-world ownership experience.
Key Ranking Factors
Complaint Severity
NHTSA owner complaints weighted by component category (e.g., powertrain, safety systems, electronics, cosmetic) — safety-critical issues carry more weight than cosmetic ones. Adjusted for sales volume so high-volume models aren't unfairly penalized.
Repair Costs
Independent reliability ratings based on repair frequency, average repair costs, and severity of typical repairs for each model.
Recall Impact
Number of NHTSA recalls weighted by severity. “Stop driving” and fire-risk recalls are penalized more heavily than minor software or labeling recalls.
Issue Diversity
Measures how many major vehicle systems (engine, transmission, electrical, braking, etc.) have recorded complaints. A vehicle with issues spread across many systems may indicate systemic quality issues.
Scores are grouped into four tiers:
- 80–100: Excellent— Top-tier reliability, minimal issues
- 60–79: Good— Reliable with some minor concerns
- 40–59: Mixed— Notable issues, research before buying
- 0–39: Risky— Significant problems, proceed with caution
Data is sourced from NHTSA recall records, owner complaint filings, and independent repair databases via vehicles.dev. Scores are recalculated as new data becomes available. While the weighting model is proprietary, all underlying data sources are public and traceable.
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