AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2015 Hyundai Sonata
Overall rating NHTSA-grounded
Average
Estimated 5-year repair + maintenance cost: $5,000–$13,000
The 2015 Hyundai Sonata has a mixed reliability record with frequent engine and electrical system complaints. The vehicle's issues are balanced by relatively fewer critical recalls, mostly concerning lighting and airbag systems.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| engine | 70,000–100,000 miles | $1,500–$5,000 | very common |
| electrical system | 50,000–80,000 miles | $500–$1,800 | common |
| powertrain | 60,000–90,000 miles | $1,200–$3,000 | common |
| service brakes | 40,000–70,000 miles | $300–$800 | occasional |
| steering | 50,000–80,000 miles | $600–$1,500 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Change engine oil every 5,000 miles
- Replace air filter every 15,000 miles
- Flush cooling system every 90,000 miles
- Replace brake fluid every 30,000 miles
- Inspect belts and hoses annually
- Replace timing belt at 90,000 miles
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Engine knocking noises
- Check engine light intermittently
- Delayed transmission engagement
- Hard or soft brake pedal
- Steering wheel feels loose
Generated by gpt-4o on 7/25/2026. Cost ranges are conservative estimates that account for typical regional variation.