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Mercury MountaineerModel year report

2010 Mercury Mountaineer Problems

Complaints
13filed with NHTSA
Median mileage
38,660miles, 11 complaints with mileage
Recalls
1campaigns on record
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA crash rating
—overall rating starts with 2011 models
EPA fuel economy
17 mpgcombined, 4.6L 8-cyl RWD · 15 city / 21 hwy

Sources: NHTSA records for the 2010 Mercury Mountaineer (complaints, recalls, investigations), NHTSA crash tests, EPA fuel economy. Report an error

NHTSA recorded 13 consumer complaints for the 2010 Mercury Mountaineer. The part named most often is brakes, with 5 complaints (38% of the total), followed by vehicle speed control (4) and engine (3). 11 of the complaints include a mileage, and 55% of those were filed for vehicles with under 50,000 miles; the median is 38,660 miles. NHTSA lists 1 recall campaign and 20 technical service bulletins for this model year. Brakes complaints overlap with 3 technical service bulletins filed under the same part.

This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Also reported: Seats (1), Body and structure (1).

Example complaints

Brakes: “There is a manufacturing fault with the position of the brake and the gas pedal. It is very easy to move the right foot from the gas to the brake and leave enough of the foot on the gas at the same time. It allows the brake to be pressed but also applies gas to give a vehicle a surge while braking. Had the same situation with a 2001 ford taurus and ford issued a recall notice to have the placement of pedals changed.”

NHTSA complaint #10547840, filed 2013-10, 31,000 miles

Vehicle speed control: “While driving the Mountaineer I was slowing for a stoplight shortly after starting it up (had driven about 1/3 mile). The engine suddenly started to speed up and required significant extra braking force to come to a stop. I put the car in neutral and the engine ran at about 3,300 RPM for about 10 seconds. This is the third time this has happened. The first time the thermostat was replaced. The second time the throttle body was replaced. The third time the vehicle was checked but no defect could be found. …”

NHTSA complaint #10534451, filed 2013-08, 55,000 miles

Engine: “Pulled into parking space, placed shifter in park, turned off ignition, released brake and vehicle rolled backwards as if not in park. Attempted to restart vehicle and no response. Set parking brake. Could not get vehicle to lock into park, shifter moved regardless of brake on or not and would not start. Moved shifter through entire range of gears and returned to park, vehicle still would not start and park would not hold. Called dealer and was told to have it towed in. Returned to vehicle and tried once more and it started and proceeded to respond normally. …”

NHTSA complaint #10460011, filed 2012-05, 6,125 miles

Mileage when problems were reported

55% of the 11 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 31,000 and 65,000 miles.

18%0–100%10–2536%25–5027%50–759%75–1009%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (11 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 38,660 miles.

Complaints by year filed

Fewer than 15 complaints, too few for a reliable trend.

201220133201420152016201820192022
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Crash test ratings

NHTSA's 5-Star Safety Ratings for the 2010 Mercury Mountaineer. Frontal results are shown driver / passenger; rollover shows the star rating and NHTSA's estimated risk of rolling over in a single-vehicle crash.

VersionOverallFrontalSideSide poleRollover
Mountaineer · sedan RWD/AWDnot rated5 / 5——3 · 22.8% risk

Ratings before the 2011 model year come from an older, less demanding test and are not comparable with ratings for 2011 and later.

Source: NHTSA New Car Assessment Program (5-Star Safety Ratings), nhtsa.gov/ratings.

Fuel economy and running cost

EPA ratings for each 2010 Mercury Mountaineer version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
Mountaineer 2WD4.0L 6-cyl5-speed automatic142016$4,200
Mountaineer 2WD4.6L 8-cyl6-speed automatic152117$3,950
Mountaineer AWD4.0L 6-cyl5-speed automatic131915$4,450
Mountaineer AWD4.6L 8-cyl6-speed automatic141916$4,200

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

Recall details for the 2010 Mercury Mountaineer → · Check a VIN at nhtsa.gov/recalls

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 20 on record; the latest 10 are shown.

See all 20 bulletins →

Other model years of the Mercury Mountaineer

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
20101338,6601—17—Not enough data
2009647,0000—17—Not enough data
20089665,8001—16Not compared (fewer than 3 comparable model years)Falling
20078175,0000—16Not compared (before 2008)Rising
200611758,8491—16Not compared (before 2008)Falling
20058256,7500—15Not compared (before 2008)Rising
200421068,0000—16Not compared (before 2008)Falling
200315278,7840—16Not compared (before 2008)Falling
200237275,0002—16Not compared (before 2008)Falling
20012275,0003—17—Stable
200012370,0006—16Not compared (before 2008)Rising
199915170,0007—16Not compared (before 2008)Stable
199823685,0005—16Not compared (before 2008)Stable
1997328124,0006—14Not compared (before 2008)Falling

All Mercury Mountaineer model years · Best and worst years by complaints

Frequently asked questions

How many NHTSA complaints does the 2010 Mercury Mountaineer have?

NHTSA recorded 13 consumer complaints for the 2010 Mercury Mountaineer as of Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2010 Mercury Mountaineer is reported most often?

Brakes is named most often, in 5 complaints (38% of the total), followed by vehicle speed control with 4.

Has the 2010 Mercury Mountaineer been recalled?

NHTSA lists 1 recall campaign for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2010 Mercury Mountaineer get?

The EPA rates the 2010 Mercury Mountaineer (Mountaineer 2WD, 4.6L 8-cyl) at 17 mpg combined, 15 city and 21 highway, with an estimated annual fuel cost of $3,950 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2010 Mercury Mountaineer reported?

Among the 11 complaints that include a mileage, the median is 38,660 miles and the middle half falls between 31,000 and 65,000 miles; 55% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Crash ratings are from NHTSA’s New Car Assessment Program. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.