really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
69,113 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 Mariner engine problems

engine problem

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2006 Mercury Mariner Owner Comments

problem #12

Aug 082014


  • 145,000 miles


Tone ring snapped off of axle and caused the car to go into 2wd and apply the ABS brakes when not actually being needed which almost ended up in rear ending a car when the failure occurred. Tone ring design needs looked it. This should not happen. Corrosion building up between the tone ring and axle seems to be what caused the force of snapping this ring. Just a poor design.

- Felton, PA, USA

problem #11

Jul 012010

Mariner 4-cyl

  • 40,000 miles
Many times, either after a stop or letting my foot off the gas pedal and then trying to push the gas pedal again, the pedal would not move, and I could no longer accelarate and have been forced a few times to pull off to the side of the road until I could get it to press down. Sometimes waiting for 5+ minutes for it to work. I had someone look at it, it's the throttle body. It gets build up in it and can't compress, seems to be worse in the cooler weather (vs summer). This is a very dangerous, especially with traffice around, and I have had my kids in the car when its happened and I get nervous it'll happen in a situation that I can't prevent an accident. I have never had a problem with a throttle on any of my other cars, nor have I known anyone with this issue.

- Tigard, OR, USA

problem #10

Oct 082010

Mariner 4-cyl

  • 56,000 miles
Early on only happened a few times during winter. But as of recently it has become very dangerous to the point I've pulled out after being at a light or stop sign into traffic and unable to go. Gas pedal will not budge. I've had a friend following behind me at one point and they actually ran into the back of my vehicle, luckily no damage was done to there car and mine suffered minor damages to the bumper. I've been hearing things about Ford extending warranty to ten years and 150,000 miles to fix this type of problem possibly with failure of defective throttle body system. But I don't know if that's my issue. I do know I've almost been in seven accidents within the past two weeks.

- Fayetteville, NC, USA

problem #9

Dec 042013

Mariner 4-cyl

  • 90,000 miles


Stop at a red light the fuel peddle got stuck would not accelerate. Finally the Mariner started moving then had to come to a stop for stop sign same thing happened. Took it to the shop said the "throttle" was broken on this. This is a very dangerous can't drive it with the throttle being broken. Never had a problem with a throttle on any of my pass cars. Tracer, ls mustang I have these cars over the years. Bought all of my cars from the same dealership.[xxx] information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Huntsville, AL, USA

problem #8

Nov 112009


  • miles
When the temperature is cold, the accelerator will not allow itself to be depressed after 1-2 minutes of driving, and then for the next 10-15 minutes. Occasionally, tapping on the pedal, or pushing extremely hard will make it move and the vehicle will dangerously and rapidly accelerate due to the excessive force required until the driver is able to adjust the force, which sometimes causes the pedal to become stuck closed again on a high speed road. Over the years, this problem has become progressively worse. It is very dangerous and should be fixed by the manufacturer.

- Tyrone, GA, USA

problem #7

Sep 162013


  • 87,000 miles
The contact owns a 2006 Mercury Mariner. The contact stated that while driving 60 mph, the vehicle decelerated without manual force. The failure recurred on two separate occasions. The vehicle was taken to an independent mechanic for diagnosis where it was stated that the thermostat needed to be replaced. The vehicle was repaired and the manufacturer was not notified. The VIN was not available. The approximate failure mileage was 87,000.

- East Orange , NJ, USA

problem #6

Jul 212013

Mariner 6-cyl

  • 77,541 miles


While building speed via an on-ramp on ca freeway 680, the transmission began to fail. Within roughly 200 yards, the car lost power and, thankfully, I was able to get my car to the side of the freeway. The first time I was able to get the car to work again, I was only able to drive about 50 yards. I then let the car 'rest' for about 20-30 minutes (while I contact my roadside assistance company). After that amount of time, I tried the car again and was able to drive to the next off-ramp (industrial way, benicia, ca). At the stop sign of that off-ramp, the car failed again and I chose to have it towed instead of continue trying to make it work properly. My Mariner is a 2006 with only 77,541 miles! my car eventually got to a transmission shop to be fixed, but it was in my research of the problem that I found failing/faulty transmissions to be a very common and known issue for Mariners with low mileage (model years of 2005-2011, at least). My complaint is that there should be a recall issued because this is a well known problem.

- Carmel, CA, USA

problem #5

Oct 092012


  • 107,313 miles
The contact owns a 2006 Mercury Mariner. The contact stated that the accelerator pedal became stuck to the floorboard while driving. The failure was experienced several times. The accelerator pedal was depressed with force in order for it to release. The vehicle was not taken to the dealer. The manufacturer was made aware of the failure. The vehicle was not repaired. The approximate failure and current mileage was 107,313.

- Decatur , GA, USA

problem #4

Jul 192012


  • 88,500 miles
I was entering the interstate 430 at the maumelle, Arkansas on ramp and began accelerating to merge with rush hour traffic. I noticed that I had accelerated faster than normal...70 mph. I took my foot off the accelerator to slow down, but I didn't slow down. I thought I must have hit the cruise control button, so I hit the off button and brake and slowed slightly...60mph the cruise control was not on. I let off the brake and car began accelerating back up to 65 mph very quickly. By this time, I was entering the interstate 40 on ramp/crystal hill exit in North little rock, Arkansas. I realized that my brakes were not slowing my SUV and I had to get the car to a stop. I stayed on the crystal hill exit...pushing on brakes as hard as I could. I only slowed to about 40 or 50 mph. I turned my hazard lights and began edging to the shoulder. So still pushing on my brakes, I put the SUV in neutral. I finally stopped about 100 feet from the stop sign at the crystal hill road. When I stopped, I noticed the engine was revving a lot so I put it in park and turned the SUV off. I tried to stay calm for me and my baby since I was 35 weeks pregnant. I was lucky that I didn't have to crash the car to stop it or I didn't go into labor, but putting it in neutral worked. My husband had my SUV towed to crain Ford dealership. They have diagnosed the problem to be the air intake valve and the throttle position sensor. The tow truck driver and the mechanic at the dealership said the SUV was messed and barely got it in the garage to repair which the dealership is working on...one week later. The diagnosis was verbal from the dealership...nothing in writing as of yet.

- Maumelle, AR, USA

problem #3

May 012011


  • 35,000 miles
The contact owns a 2006 Mercury Mariner. The contact stated that while driving approximately 5 mph, the accelerator pedal began to stick in a partially depressed position. The vehicle was taken to an independent mechanic and the accelerator cable was replaced. The failure recurred approximately two months later. The vehicle was taken back to the mechanic for the same repair. The failure continued. The manufacturer was not made aware of the failure. The failure mileage was 35,000.

- Lilburn, GA, USA

problem #2

Sep 252010


  • 103,000 miles
The contact owns a 2006 Mercury Mountaineer. The contact was driving 35 mph when the accelerator pedal became stuck. The failure would occur intermittently and the contact would have to tap the pedal several times before it would release. The vehicle was taken to the dealer who stated that a tube would need to be cleaned in order to keep the pedal from sticking. There were no recalls related to the failure and the repairs of $400 were at the contacts expense. The manufacturer was not contacted. The failure mileage was 103,000.

- Kenmore, WA, USA

problem #1

Oct 012005


  • miles
I purchased my Mercury Mariner 2006 in 2005. While under warranty, I brought in the vehicle several times to the dealership for service due to the gas pedal sticking. I would try to accelerate and it would stick and not accelerate. After several visits they determined it was a fluid problem or it needed to be cleaned. The problem still persisted after maintenance was performed. At my last visit, the part was replaced. The pedal still sticks, but I am now out of warranty and cannot afford to play guessing games with my dealership at costs to me. On a couple of occasions the vehicle did accelerate rapidly without cause, however my main problem has been the gas pedal sticking. It typically happens during cold humid climate.

- Harahan, LA, USA

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