AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2009 Cadillac Sts
Overall rating NHTSA-grounded
Below average
Estimated 5-year repair + maintenance cost: $7,000–$12,000
The 2009 Cadillac STS has multiple complaints related to air bags, electronic stability control, and service brakes, suggesting reliability concerns in critical safety systems.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| air bags | 70,000–100,000 miles | $800–$1,500 | very common |
| electronic stability control | 60,000–90,000 miles | $400–$1,000 | common |
| steering system | 80,000–110,000 miles | $500–$1,300 | common |
Scheduled maintenance to budget
Routine items every owner should plan for.
- oil change every 5,000 miles
- replace brake pads every 30,000 miles
- coolant flush every 60,000 miles
- transmission service every 50,000 miles
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- air bag warning lights
- ESC warning light on dashboard
- steering wheel play or noise
- brake pedal soft or spongy
Generated by gpt-4o on 7/25/2026. Cost ranges are conservative estimates that account for typical regional variation.