How many miles will a 2009 Mercury Mariner last?
Half of the 272 NHTSA owner complaints on the 2009 Mercury Mariner that list mileage came after 96,000 miles, and 1 in 10 after 153,000 miles. NHTSA's complaints file of November 11, 2026 holds 336 complaints on this model year; each mileage is the odometer when an owner reported a safety problem, not how long the vehicle lasted.
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See what the paid report includes →Of the 272 complaints on the 2009 Mercury Mariner that list mileage, the middle half came between 65,000 and 123,000 miles; 119 (44%) came after 100,000 miles, 28 (10%) after 150,000 and 2 (1%) after 200,000.
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How many miles will a 2009 Mariner last?
The 272 mileages owners gave run from 10 to 233,812 miles. A quarter are at or under 65,000 miles, half at or under 96,641, three quarters at or under 122,680 and nine in ten at or under 154,000; 119 (44%) came after 100,000 miles, 28 (10%) after 150,000 and 2 (1%) after 200,000.
These mileages say when owners reported a problem, not when a 2009 Mariner wears out. NHTSA's file holds only vehicles whose owners complained; one that ran without a problem never appears in it, so it gives no lifespan and no cutoff, and how a vehicle was maintained matters more than any one odometer reading.
| Measure | Value |
|---|---|
| Lowest mileage listed | 10 miles |
| 25th percentile | 65,000 miles |
| Median (50th percentile) | 96,641 miles |
| 75th percentile | 122,680 miles |
| 90th percentile | 154,000 miles |
| Highest mileage listed | 233,812 miles |
| Complaints after 100,000 miles | 119 (44%) |
| Complaints after 150,000 miles | 28 (10%) |
| Complaints after 200,000 miles | 2 (1%) |
Every model year together: Half of the 1,286 NHTSA owner complaints on the Mercury Mariner that list mileage came after 89,000 miles (NHTSA complaints file of November 11, 2026). How many miles will a Mercury Mariner last? →
Common problems with the 2009 Mariner
NHTSA's file holds 336 owner complaints on the 2009 Mercury Mariner. Owners named steering most often: 175 complaints, and half of the 129 that list a mileage came after 118,000 miles. A complaint can name more than one component.
| Component (NHTSA category) | Complaints | Listing mileage | Median mileage |
|---|---|---|---|
| Steering | 175 | 129 | 119,000 |
| Engine | 57 | 54 | 74,000 |
| Vehicle Speed Control | 47 | 45 | 70,000 |
| Power Train | 45 | 42 | 69,000 |
| Electrical System | 25 | 18 | 98,291 |
Of the 336 complaints, 11 report a crash, none reports a fire and 3 report an injury (3 people reported injured). These are owners' reports to NHTSA, not findings.
Is the 2009 Mariner a good year?
Complaint counts cannot say whether the 2009 is a good or a bad Mariner: they rise with how many were sold and how long they have been on the road. They show how the 2009 compares with the other model years in NHTSA's file.
With 336 complaints, the 2009 ranks 2nd of the 7 Mercury Mariner model years from 2005 to 2011 with 10 or more complaints, counting from the most. The most: the 2008 (577). The fewest: the 2007 (64).
Recent model years have had less time to collect complaints, so their counts are still growing. No year is ranked by mileage here, because a year's median mileage mostly follows its age.
| Model year | Owner complaints | Listing mileage | Median mileage |
|---|---|---|---|
| 2005 Mariner | 67 | 56 | 59,136 |
| 2006 Mariner | 101 | 90 | 87,000 |
| 2007 Mariner | 64 | 58 | 70,100 |
| 2008 Mariner | 577 | 509 | 100,000 |
| 2009 (this page) | 336 | 272 | 96,641 |
| 2010 Mariner | 279 | 233 | 61,100 |
| 2011 Mariner | 87 | 68 | 51,879 |
2009 Mercury Mariner recalls
NHTSA's recall files of November 11, 2026 list 2 recall campaigns that name the 2009 Mercury Mariner (1 vehicle campaign and 1 equipment or tire campaign that names this model year, often for aftermarket parts). A campaign covers a production range, not every vehicle of the model year: check the VIN with NHTSA's free recall lookup.
What these figures can and cannot tell you
- Complaints are owners’ reports to NHTSA. NHTSA publishes them without verifying them: a complaint is an allegation, not a defect finding.
- The mileage is what the owner wrote on the complaint; NHTSA does not check it against the odometer.
- The make, model and model year are the ones on the complaint. NHTSA records them as filed, so a few complaints sit under a model year the name was not sold in.
- They are not a lifespan study. The file holds only vehicles whose owners reported a problem, so these figures do not say how long a typical 2009 Mariner lasts.
- A complaint count rises with how many vehicles were sold and how long they have been on the road, so it is not a rating of the 2009 Mariner.
- Nothing here describes one vehicle: its title brands, odometer readings, accidents and open recalls are in the records for its own VIN.
- 64 of the 336 complaints on the 2009 Mercury Mariner give no usable mileage (blank, zero, a filler such as 999999, or over 500,000) and are left out of every mileage figure.
- NHTSA names counted: MARINER, MARINER HYBRID and MARINER HEV. NHTSA files some vehicles under several names (a series name and a trim name, for example); this page counts only these.
- Recall-file name matched: MARINER.
Primary sources behind this page
Open the underlying public source and verify that its scope matches the question you are asking.
- NHTSA complaints flat file (FLAT_CMPL.zip), downloaded November 11, 2026National Highway Traffic Safety Administration
- Complaints file field layout (CMPL.txt)National Highway Traffic Safety Administration
- NHTSA recalls flat file (FLAT_RCL_PRE_2010.zip), downloaded November 11, 2026National Highway Traffic Safety Administration
- NHTSA recalls flat file (FLAT_RCL_POST_2010.zip), downloaded November 11, 2026National Highway Traffic Safety Administration
- Recalls file field layout (RCL.txt)National Highway Traffic Safety Administration
- NHTSA recall and complaint datasets: scope and documentationNational Highway Traffic Safety Administration
- Recalls Lookup by VINNational Highway Traffic Safety Administration
NHTSA’s complaints file was downloaded on November 11, 2026 (FLAT_CMPL.txt, dated 2026-11-11 10:15, 2,265,416 rows), with its recall files (FLAT_RCL_PRE_2010.txt and FLAT_RCL_POST_2010.txt, dated 2026-11-11 08:02). Each complaint is counted once, by its NHTSA number, with the model year and mileage of its first row; a model year has a page only with 10 or more complaints. The collection script and its rules are in scripts/collect-nhtsa-model-year-longtail.mjs.
2009 Mercury Mariner questions
How many miles will a 2009 Mercury Mariner last?
Half of the 272 NHTSA owner complaints on the 2009 Mercury Mariner that list mileage came after 96,000 miles, and 1 in 10 after 153,000 miles. Of the 272 complaints on the 2009 Mercury Mariner that list mileage, the middle half came between 65,000 and 123,000 miles; 119 (44%) came after 100,000 miles, 28 (10%) after 150,000 and 2 (1%) after 200,000. These are mileages at a reported problem, not a lifespan: the file holds no 2009 Mariner that never had one.
What are the most common 2009 Mercury Mariner problems?
NHTSA's file holds 336 owner complaints on the 2009 Mercury Mariner. Owners named steering most often: 175 complaints, and half of the 129 that list a mileage came after 118,000 miles. A complaint can name more than one component. Of the 336 complaints, 11 report a crash, none reports a fire and 3 report an injury (3 people reported injured). These are owners' reports to NHTSA, not findings.
Is the 2009 Mercury Mariner a good year?
Complaint counts cannot say whether the 2009 is a good or a bad Mariner: they rise with how many were sold and how long they have been on the road. They show how the 2009 compares with the other model years in NHTSA's file. With 336 complaints, the 2009 ranks 2nd of the 7 Mercury Mariner model years from 2005 to 2011 with 10 or more complaints, counting from the most. The most: the 2008 (577). The fewest: the 2007 (64).
How many recalls does the 2009 Mercury Mariner have?
NHTSA's recall files of November 11, 2026 list 2 recall campaigns that name the 2009 Mercury Mariner (1 vehicle campaign and 1 equipment or tire campaign that names this model year, often for aftermarket parts). A campaign covers a production range, not every vehicle of the model year: check the VIN with NHTSA's free recall lookup.
How do I check a used 2009 Mercury Mariner before buying?
Take the 17-character VIN from the vehicle and compare the odometer with the readings on file for it: title transfers, inspections and auction sales record the mileage on the day. VIN Lookup (free-vin-lookup.com) sells the original ClearVIN PDF for $14.99 (3 reports for $29.99, 5 for $44.99): odometer readings, title brands and auction records on file for the VIN. Check the VIN before buying a used 2009 Mercury Mariner.