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EnginePart report

2006 Mercury Mountaineer Engine Problems

Complaints
14about this part
Share
12%of 117 total for the year
Median mileage
75,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 14 complaints about the engine of the 2006 Mercury Mountaineer, 12% of the 117 complaints for this model year. Where a mileage was given, the median is 75,000 miles. 1 a fire, according to the filers.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“I have gone through 3 radiators so far and now I need a 4th. This time, the radiator caused the pumps to start leaking ( which are not serviceable) and eventually ruined my transmission, rendering the truck non-drivable. This problem has cost me thousands of dollar and I want a recall to start on this part with ford.”

NHTSA complaint #10558560, filed 2014-01, 115,000 miles

“I purchased this vehicle recently with only 40,000 miles. The car keeps stalling or dying as you may say as I drive. It will be okay for a short period of time and then just die right on the highway! Once it dies once, the car will continue to do so over and over again until the engine has cooled down. I have the engine codes of p2104, p2111 and p2135 with a refere to p2101. I have brought it to several mechanics and paid well over $1,000 to fix this problem and it just continues. I am afraid my family may all die! …”

NHTSA complaint #11022125, filed 2017-09, 42,000 miles

“My 2006 Mercury Mountaineer was leaking coolant due to a crack in the radiator. After searching online forums, I have learned that has been a long standing issue with many of this vehicles owners. Unfortunately for owners, ford issued a tbs in 2009 just in time for most of the affected vehicles' warranties to expire. Some owners are on their 3rd or more radiator replacement, I am only on my first. I petition that ford recalls this issue before myself and others have to repeatedly pay for this clear design problem with their hard owned money. …”

NHTSA complaint #10790412, filed 2015-11, 120,000 miles

“Purchased in june 2009 and have had problem after problem. Mountaineer premier awd. Transmission issue, feels like you're getting hit from behind when coming to a stop. Radiator leaks. Back lift gate randomly opens, won't latch. When it rains, water comes in through the interior light mount and through dvd player. Spark plugs not easily replaced, broke off and had to be towed to a shop for removal. Gas unable to be pumped properly I can put in .25 at a time if I'm lucky. It takes 20 minutes to pump half a tank of gas. I love the features this vehicle has but this has been such a hassle.”

NHTSA complaint #10512649, filed 2013-05, 58,945 miles

“Truck cooling system died which caused the truck to catch fire while driving down the highway, smoke poring out, state troopers had to assist us. My daughter was scared to death and now refuses to get back in the truck even though we got a new engine. To make matters worse we spent 3000 on and engine...500 on cooling system and had the transmission reprogrammed. The truck is still have major problems and now for says it needs the transmission rebuilt or replaced. All of this is out of pocket. We cant even trade it in bc they will only give us 1/2 of what we paid for it 2 yrs ago. …”

NHTSA complaint #10466883, filed 2012-07, 54,000 miles

Related service bulletins

Engine: other model years

YearComplaintsShare of year
2010323%
200866%
200756%
20061412%
200579%
200484%
200311%
200221%
200115%
200043%
199821%

Other parts of the 2006 Mercury Mountaineer

Engine cooling
43 complaints
Transmission and drivetrain
39 complaints
Electrical system
9 complaints
Other or unknown
9 complaints
Body and structure
7 complaints
Seats
6 complaints
Fuel system
5 complaints
Brakes
3 complaints
Vehicle speed control
3 complaints
Equipment
2 complaints
Exterior lighting
2 complaints
Tires
2 complaints

← All problems reported for the 2006 Mercury Mountaineer

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology