AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2009 Mercury Mountaineer
Overall rating NHTSA-grounded
Average
Estimated 5-year repair + maintenance cost: $4,500–$6,500
The 2009 Mercury MOUNTAINEER has an average reliability rating due to minimal recall activity and a small number of complaints across various systems, indicating no systemic failures.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| steering system | 60,000–100,000 miles | $300–$600 | common |
| seat adjustment mechanism | 50,000–80,000 miles | $150–$350 | occasional |
| brake system | 70,000–110,000 miles | $250–$500 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Oil and filter changes
- Brake inspections and maintenance
- Tire rotations and alignments
- Coolant system flushes
- Spark plug replacement
- Transmission fluid change
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Steering difficulty or stiffness
- Unusual seat noises or movements
- Brake pedal vibration or noise
Generated by gpt-4o on 7/25/2026. Cost ranges are conservative estimates that account for typical regional variation.