Reliability & 5-year cost of ownership — 2009 Mercury Mariner
NHTSA data on file today
The 2009 Mercury Mariner has 2 NHTSA recall campaigns and 315 owner complaints on file as of . Recall data is refreshed daily from NHTSA.
Recall campaigns on file
- NHTSA #15E045000 Front Wheel Bearing has Wrong Dimensions NHTSA notice
- NHTSA #14V284000 Loss of Electric Power Steering Assist NHTSA notice
Most-cited components in owner complaints
- Steering 167 complaints
- Engine 53 complaints
- Power Train 44 complaints
- Vehicle Speed Control 41 complaints
- Electrical System 22 complaints
- Fuel System, Gasoline 15 complaints
Of the 315 complaints on file, 9 report a crash; across all 315 complaints, owners report 3 injuries (owner-reported, not verified by NHTSA).
Below average
Estimated 5-year repair + maintenance cost: $5,000–$9,000AI estimate — not from NHTSA data
The 2009 Mercury Mariner faces frequent steering issues due to electric power assist failures, alongside engine and transmission problems, contributing to its below-average rating.
Most-common failures
| Part | Typical mileage (AI estimate) | Cost range (AI estimate) | Frequency |
|---|---|---|---|
| steering system | 60,000–90,000 miles | $900–$1,400 | very common |
| engine components | 80,000–110,000 miles | $1,500–$3,500 | common |
| transmission | 90,000–120,000 miles | $1,800–$3,000 | common |
| electrical system | 70,000–100,000 miles | $300–$800 | occasional |
| wheel bearings | 50,000–80,000 miles | $250–$500 | occasional |
AI estimate — not from NHTSA data: the mileage bands and repair-cost ranges above. Get a written repair quote before you budget.
Scheduled maintenance to budget
Routine items every owner should plan for.
- Oil and filter change every 5,000 miles
- Brake fluid replacement every 2 years
- Transmission fluid change every 60,000 miles
- Inspect suspension components annually
- Replace air filter every 30,000 miles
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Steering becomes stiff
- Check engine light stays on
- Unusual transmission noises
- Electrical components not working
- Wheel bearing noises
Generated by gpt-4o on from the NHTSA recall campaigns and owner-complaint counts on file for the 2009 Mercury Mariner at the time. The rating is an AI assessment; cost and mileage figures are AI estimates, not NHTSA data.