AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2006 Cadillac Sts
Overall rating NHTSA-grounded
Below average
Estimated 5-year repair + maintenance cost: $6,000–$10,000
The 2006 Cadillac STS shows reliability challenges, particularly with the fuel and power train systems, reflected in recalls and owner complaints. These issues elevate the expected maintenance costs over ownership.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| fuel pump | 60,000–90,000 miles | $500–$1,000 | common |
| rear axle pinion seal | 70,000–100,000 miles | $200–$500 | occasional |
| engine control module | 80,000–120,000 miles | $300–$700 | occasional |
| electronic throttle control | 60,000–90,000 miles | $250–$600 | occasional |
| airbag system | 70,000–110,000 miles | $600–$1,500 | rare |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Oil and filter changes
- Brake fluid replacement
- Tire rotations and alignment
- Spark plug replacement
- Air filter replacement
- Transmission fluid change
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Check engine light
- Fuel smell in the cabin
- Unusual noises from rear axle
- Inconsistent engine power
- Erratic throttle response
Generated by gpt-4o on 8/19/2026. Cost ranges are conservative estimates that account for typical regional variation.