AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2009 Porsche Cayman
Overall rating NHTSA-grounded
Above average
Estimated 5-year repair + maintenance cost: $4,500–$7,500
The 2009 Porsche Cayman shows remarkable reliability with low complaint levels. While the powertrain exhibits the highest concern, overall issues are infrequent, suggesting solid build quality.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| powertrain | 75,000–100,000 miles | $1,500–$3,000 | occasional |
| vehicle speed control | 50,000–80,000 miles | $400–$1,000 | rare |
| engine | 90,000–120,000 miles | $2,000–$5,000 | rare |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Oil and filter change every 10,000 miles
- Brake fluid replacement every 20,000 miles
- Coolant check annually
- Transmission fluid change every 50,000 miles
- Spark plugs replacement every 60,000 miles
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Unusual shifting behavior
- Sudden loss of acceleration
- Engine knocking noises
Generated by gpt-4o on 8/19/2026. Cost ranges are conservative estimates that account for typical regional variation.