really awful
Crashes / Fires:
0 / 0
Injuries / Deaths:
1 / 0
Average Mileage:
44,738 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2006 Mercury Mountaineer engine problems

engine problem

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2006 Mercury Mountaineer Owner Comments

problem #17

Jul 212014

Mountaineer 6-cyl

  • miles


2006 Mercury Mountaineer. Consumer writes in regards to failure of the water manifold housing. The consumer stated he was driving 70 mph, when the engine light illuminated. The vehicle began to overheat and steam was coming from under the hood. The water manifold housing had come apart, allowing water to boil out. The housing was plastic and made of two parts. The top and bottom were glued together and within the total circumference of about 18 inches, there were only three bolts between the top and bottom housings to secure the two parts together, except the glue. The consumer believed the construction was not enough to keep them from separating under pressure. It appeared, the design created a tendency for the top plate to pull away from the lower housing. The consumer attempted to install a new housing, but he discovered the engine was misfiring, so the vehicle had to be towed to the dealer, where the long block assembly was replaced.

- Mccall, ID, USA

problem #16

Apr 122013


  • 52,000 miles
Had a leak in my radiator when the truck had less then 25,000 (summer of 2009?) miles logged on it. Took it to the dealership and they replaced it for free because it was under warranty. Again this spring, with my odometer at 52000 miles, it has another leak and I was quoted $800 to get it replaced because it is no longer under warranty. This is B.S.! obviously it is a known problem. I have not had it fixed yet because I don't have the time to leave it at the dealership, or the $800 to replace a radiator that should not need to be replaced after such a short amount of use. This issue needs to be rectified by Ford! it has made me never want to buy another Ford vehicle, ever!

- Vancouver, WA, USA

problem #15

Apr 052011


  • 53,000 miles
The radiator keeps leaking, first dealer said there was nothing wrong with the vehicle, I am always putting coolant in the vehicle. You can smell the coolant as soon as you open the hood. This has been an ongoing problem since I had 53,000 miles and now that I have 122,000 miles it is getting worse and has to be repaired again.

- Hackettstown, NJ, USA

problem #14

Apr 012013

Mountaineer 6-cyl

  • 58,000 miles


Please investigate Ford Mercury faulty radiators. There is a design flaw and should be recalled.

- Metairie, LA, USA

problem #13

May 132012

Mountaineer 6-cyl

  • Automatic transmission
  • 65,000 miles
The contact owns a 2006 Mercury Mountaineer. The contact stated that there was a leak from the radiator and the contact had to fill the radiator constantly. The vehicle was not taken to a dealer or a repair shop for diagnostics or repairs. The manufacturer was not made aware of the failure. The failure mileage was 65,000. The current mileage was 68,000. Updated 07/10/13

- Harrisbug, PA, USA

problem #12

Oct 252012

Mountaineer 8-cyl

  • 80,000 miles
Vehicle needed a radiator. The dealership replaced the radiator and continues to leak antifreeze causing vehicle to over heat.

- Piscataway , NJ, USA

problem #11

Jul 202009

Mountaineer 6-cyl

  • 40,000 miles


In July 2009 at 40000 miles the radiator had a hairline fracture and the radiator had to be replaced, paid out of pocket by owner. In March 2010, at 60000 miles, another radiator is being put in this vehicle, again out of pocket expense for owner. There should not be a need for a vehicle to have had 3 radiators at 60000 miles. The dealership states this is a known issue with this model and that these are poorly placed and manufactured radiators. Ford/Mercury should recall these vehicles and reimburse out of pocket expenses for anyone that has proof of radiators being replaced.

- Franklin, TN, USA

problem #10

Jan 092011


  • 42,000 miles
The contact owns a 2006 Mercury Mountaineer. The contact stated anti-freeze fumes were inside of the vehicle and a pregnant passenger became ill from the fumes. The contact later discovered that the anti-freeze was leaking. The vehicle was taken to the dealer but the dealer was unable to duplicate the failure. The manufacturer had not been notified of the failure nor was the vehicle repaired. The current mileage was 55,000 and the failure mileage was 42,000. The VIN was unavailable.

- El Dorado, AR, USA

problem #9

Nov 172011


  • 62,000 miles
The radiator coolant system is junk. Busted seals and hoses all the time. I am beginning to think this car is a lemon. I replaced my radiator less than 1 year ago, had the part replaced with the factory part Ford supplies and once again I have a busted seal and have to replace the radiator again. When are they going to recall this part? seriously I've done my research and the radiators on these vehicles busting isn't an isolated incident. Is Ford going to pay $400 dollars every 6 or so months to replace my radiator. I wish someone would file a class action law suit or something.

- Philadelphia, PA, USA

problem #8

Oct 062011

Mountaineer 6-cyl

  • 58,753 miles
I have leak in my radiator, and after doing some research on the internet I found out that there is alot of complaints about that type of radiator in that vehicle, and every one of the cases is identical and now I am the next victim of this radiator failure. Some thing needs to be done about the radiator problems Mercury is having on the 2006 Mountaineer. My vehicle is very well maintained and don't even have 60,000 miles on it yet.I completely understand there will always be some kind of mechanical issues to deal with nothing last forever, but most radiators usually outlast the vehicle.

- Dalzell, SC, USA

problem #7

Oct 042011


  • 53,000 miles


The contact owns a 2006 Mercury Mountaineer. The contact stated that while driving approximately 50 mph, the radiator started to overheat. The driver was able to continue driving and added water to the radiator. The vehicle was not inspected by a dealer nor repaired. The manufacturer was contacted and they advised him that the failure was caused by normal wear and tear. In addition, he noticed that when shifting from park to reverse, the vehicle would hesitate and jerk violently into the correct gear. The failure mileage was approximately 53,000. The VIN was unavailable.

- Coovis, CA, USA

problem #6

Mar 022011


  • miles
2006 Mercury Mountaineer. Radiator being replaced for the 2nd time in 8 months. According to the mechanic the radiator is completely corroded both times.

- Logan, AL, USA

problem #5

Jan 202011


  • 80,000 miles
Radiator defect in 2006 Mercury Mountaineer. Replaced at 40,000 miles and at 80,000 miles. Not covered under warranty and not recalled as of yet.

- Maryville, TN, USA

problem #4

Jun 102010


  • miles
My 2006 Mercury Mountaineer radiator is cracked. I 've asked mechanics and they told me that the radiators have had problems. I went online and there seems to be the same problem that I am having. I'm sure Ford is aware of the problem but they are not taking any action towards the problem. Can you help us.

- Detroit, MI, USA

problem #3

Nov 162010


  • 96,000 miles
The contact owns a 2006 Mercury Mountaineer. The contact stated that the radiator continued to leak coolant. The contact stated that the radiator was previously replaced twice for the exact same failure. The leaking had not caused the vehicle to overheat but the contact stated that the coolant odor was overwhelming from the vehicle interior. The contact called the manufacturer and they stated that the vehicle was out of warranty and there were no recalls so they were unable to assist. The failure mileage was 96,000.

- Manteno, IL, USA

problem #2

Feb 012009


  • miles
The exhaust system from the catalytic converter disengaged.

- Hauppauge, NY, USA

problem #1

Jul 102008


  • 20,800 miles
My 2006 Mercury Mountaineer has a problem with the A/C fan unit. The A/C fan will not decrease in blower intensity even if manually downgrading the fan or turning up the temperature. Does not matter whether you are in auto or manual A/C mode.

- Austin, TX, USA

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