Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


really awful
Crashes / Fires:
1 / 1
Injuries / Deaths:
2 / 0
Average Mileage:
52,922 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.

2010 Mercury Mariner electrical problems

electrical problem

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2010 Mercury Mariner Owner Comments

problem #20

Jun 062016


  • 98,000 miles


While I am driving my car will all of a sudden turn off

- Galesburg, MI, USA

problem #19

Aug 032015


  • 130,980 miles
The contact owns a 2010 Mercury Mariner. While driving at approximately 45 mph, the maintenance warning light illuminated and the vehicle jerked violently. In addition, the vehicle failed to accelerate when the accelerator pedal was depressed. The failure recurred intermittently. The vehicle was taken to the dealer, who inspected the vehicle but was unable to diagnose the failure. After leaving the dealer, the maintenance and the engine warning light illuminated. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 130,980.

- Upper Marlboro, MD, USA

problem #18

Jun 212015


  • 52,000 miles
The contact owns a 2010 Mercury Mariner. While driving at approximately 75 mph, the vehicle suddenly stalled. The vehicle was restarted, but the failure recurred. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was 52,000.

- Alpharetta , GA, USA

problem #17

Jun 292010


  • 6,602 miles


The contact owns a 2010 Mercury Mariner. The contact stated that while driving at approximately 20 mph, the vehicle jerked then suddenly stalled without warning. The failure recurred several times. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was 6,602.

- San Antonio, TX, USA

problem #16

Feb 232015

Mariner 4WD 4-cyl

  • 99,901 miles
1. outside review mirrors do not defrost. They were frozen and I was on the highway putting my life in danger because I could not see outside vehicles passing to be able to go right or left. Then a week later their was frost on the mirrors and still they would not defrost again I couldn't see other vehicles on either side of my vehicle. 2. there is a gear shifting problem as well. Whenever I take off at a stop my car kicks real hard and loud enough to scare me. I have reported this several times with the dealer that I bought my vehicle from and they cannot find the problem. They have heard it do this but cannot seem to find the problem.

- Princeton, WV, USA

problem #15

Jun 262013

Mariner 4WD 6-cyl

  • 39,189 miles
Vehicle electronic throttle body (etb) was replaced at veterans Ford dealership in tampa, fl due to this part severely effecting ability of the vehicle to run properly (several times). Customer paid for this repair. Sometime after 3/4/14 when NHTSA completed their investigation, we received a notice that Ford was replacing this item. Since we already paid for the repair ($381.32) at a Ford dealership, we tried to get the reimbursement that Ford owes us. We were informed we had to have the original receipt, which to this day is still packed up in storage if we have it at all because we moved from fl to nc and are still involved in buying a new home. The bottom line is Ford (Corp) is refusing to honor their agreement to reimburse customers. The craziest part of this whole dilemma is that Ford has and controls 100% of the information needed to process our reimbursement, but absolutely refuses to do so without the original receipt. I could understand if we had this repair done at some unrelated, third party service facility. However, we went to a Ford dealership and they have record of completing the repair and us paying them for the repair. So again, Ford has all the information (proof) in their possession to take care of this reimbursement, but refuses to do so. I have called the customer (dis)satisfaction department at Ford corporate, but that is like talking to a brick wall as far as anyone having in common sense, accountability or decency to do the right thing (certainly any kind of good will is lacking in that organization). So here I am having to complain to the NHTSA to get Ford to do what they promised in the first place. I look forward to a timely reply letting me know you guys have this handled. Additionally, Ford should be reprimanded severely for such [xxx] behavior and attitude. Maybe a consumer reporter needs to get involved in all this. Thanks. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Charlotte, NC, USA

problem #14

Aug 112012

Mariner 4-cyl

  • 43,757 miles


On that date, I was driving home with my wife at approximately 2 pm. Suddenly, the car went off and the steering wheel went stiff. As I tried to move unsuccessfully, we went down to a slope of about 20 degrees. As a result, both of us had to be taken for emergency treatment for knocks, cuts and follow up checks. So far, it has cost us $16,497 and repair of the car us$6,853. There has been other events where the car suddenly stops and the steering wheel becomes stiff. But, I don T use the car in the highway but only for shorts errands and within the area where we live. Its been a nightmare. I have changed the throttle casing module, the restraint control module, I put a rubber stop on the acceleration pedal, etc. Again, out of the accident it has been over 4 thousand dollars in trying to fix the car.

- Miami, FL, USA

problem #13

Jan 112013

Mariner 4-cyl

  • 17,500 miles
First started with a suddenly a dead battery. Replaced the battery and 3 months later happened again. Slowly dead battery every 1-3 months. Replaced 4 batteries. Was diagnosed with a bad alternator. Alternator replaced. Three days later dead battery. Another alternator installed and again, two days later dead battery. Ford refused to help even after giving me a case number. Said because I've never had vehicle serviced at a dealership they couldn't do anything because they support their dealers. Also, Ford customer service failed to tell me the PCM was still under warranty. Took the car to Ford dealership in dover, de. Diagnosed with a bad PCM. PCM installed by dealership and told that should fix the problem. Drove the vehicle home and tried restarting. Battery dead again. Battery replaced per recommendations by dealership. Drove the next day, but by the end of the day battery dead again. Had to buy a remote battery pack to start the car when the battery is dead. Have been stranded 10 times and had to jump start to get home. Ford dealership told me to replace the alternator with a genuine Ford alternator ant that should fix the problem. Purchased the alternator and had it installed. Highest voltage, even with accessories turned on, was 12.8 volts and wouldn't go any higher. I am returning back to Ford dealership on Tuesday, 10/28/14 to see if they will contact Ford engineers for solution. So far, 6 batteries, 2 alternators, new PCM and battery is still not being charged. Running out of patience and money.

- Clayton, DE, USA

problem #12

Oct 022014

Mariner 6-cyl

  • 30,000 miles
Coming to a stop at a red stop light and then trying to accelerate from red to green light at an intersection my vehicle went into limp mode, it lost power. It would not accelerate pass 10mph. An engine light came on as a orange wrench light. I drove as I could and made to auto zone. They plug in the hand held car computer and it gave the code P2119. Which stands for throttle body.

- Russellville , AR, USA

problem #11

Aug 202014

Mariner 4WD 4-cyl

  • 63,968 miles
This vehicle was purchased used from a Lincoln Mercury dealer in early July, 2014. Mileage was approximately 63,500 miles. At the time the air conditioning worked fine. Early in August we noticed the air conditioning was no longer cooling the vehicle. There was an outstanding recall --- 14S05 -- related to the power steering. I took the vehicle to a local Ford dealer to have the recall work done. As a side issue I asked that the A/C be checked. To my horrified surprise I was told a "desiccant bag" in the A/C accumulator had burst and the tiny desiccant particles had spread throughout the system, clogging up various parts and causing the system to fail. These particles cannot be flushed out completely and the only fix is to replace all of the components of the A/C, for $2700!!!!! because of the cost I have not had the work done. The dealer people advised me to file a complaint with NHTSA and to contact Ford customer relations. I have done that, but no relief has been offered. I want to register my outrage at this situation particularly as a basic google search:" Ford escape/Mercury Mariner air conditioning problems or desiccant bag" reveals many hundreds, probably thousands of similar complaints (repair costs up to $4000!) and show that Ford has been aware of this issue for at least a couple of years but has taken no action. I urge you to have Ford recall the affected vehicles and repair them at Ford's expense. Thank you.

- Okemos, MI, USA

problem #10

Jul 062014

Mariner 4WD 6-cyl

  • 58,000 miles


P2112 throttle stuck. Removed throttle body 7-2-14 cleaned carbon/oil residue resulting from PCV recurc, and reinstalled throttle body, cleared codes. Driving 7-6-14 same symptoms (mil P2112 and limp home idle only) while in traffic. Idled out of traffic, shut engine off, key on engine off repeatedly tapped throttle pedal to work throttle body motor and plate. Cleared codes, drove home, pulled throttle body. Still clean with no carbon/residue or other signs of material that would obstruct throttle valve movement. Sourcing new throttle body now.

- Wayne, MI, USA

problem #9

Feb 042014

Mariner 6-cyl

  • 51,912 miles
Repeated problems with vehicle not starting. Ford dealer replaced lock module and ignition cylinder. Total cost $526.50. I purchased vehicle new, and serviced only at Ford dealership.

- Republic, MO, USA

problem #8

Oct 012013


  • miles
I have been having a problem with my 2010 Mercury Mariner for over a month. It is stalling out at random times and then the vehicle dies. Took to dealership several times and the computer is not detecting the problem so they cant determine what to fix. The dealership says it may me the throttle body, but this is not covered in my extended warranty and is a very expensive part to replace. I am a single mother with 2 kids and this is very dangerous when we are driving down the highway at 75 mph with traffic.

- El Campo, TX, USA

problem #7

Aug 072013

Mariner 6-cyl

  • 71,825 miles
I was traveling along, with my daughter in the car, when it seemed to just shut off. I was only going 40mph but in a line of traffic. I pulled the car over, it was then I could tell it was sorta still running. I come to find out later it went into a safe mode. Since then my wife or I have barely drove it. We had a close friend check it out and it is the throttle body. I then did some research online and come to find out it seems I'm not the only one with this problem. Is anyone out there making Ford Motor Company responsible for this" I called the dealership, where we purchased our vehicle new and was told there was nothing they could do, unless I paid for this. I feel this is unfair! my wife and I purchased this vehicle brand new with only 8 miles. Why should we be punished for what clearly is a defect in a Ford product" please help.

- Fort Ashby, WV, USA

problem #6

Jul 292013

Mariner 6-cyl

  • 30,000 miles
I had just gotten back from a long trip, and was stopped at a red light - I barely accelerated once it turned green, and the car lost complete and total power, in the middle of the intersection. A wrench light came on. No throttle was working as much as I pressed down. The car kept snail pacing until I got to an empty parking lot where I turned the vehicle off. I turned it back on and it revved itself, so I turned it back off. Turned it back on and all of a sudden it worked again. I took it to the dealer who claimed it was the "electronic throttle body" failing and charged me $98 for the diagnostic. I decided for a second opinion, and they took everything apart to see if it was something else since the car is only 3 years old and only has 30,000 miles on it. After much testing they concluded it was in fact the "electronic throttle body, " and the repair cost me $595. Before this happened, 2 or 3 days prior, I felt the car was losing power and it was hard to get it to go at its V6 potential. Car still hesitates and feels like the engine jumps out when it stops and moves again... sure enough my engine mounts now need replacing, and that's anywhere between $350-$500. Another recall perhaps? it's been doing this since day 1, and my warranty ended about 6 months ago. Go figure... just when 3 years was up! sigh

- Lakewood, CA, USA

problem #5

Jul 292013

Mariner 4-cyl

  • 35,800 miles
I purchased my 2010 Mariner 03/26/2013 from a local dealership. While driving at around 35 - 40 mph I noticed a grinding sound and difficulty to increase speed. I then noticed that my left blinker was flashing at a faster speed and the tail light went out. That was replaced. The car then would sporadically go dead and would have to be jumped. I had 3 different service shops look at the vehicle and found no issues. I did replace the battery and it appeared to run fine for about 3 - 4 days. It is now sporadically dead and the local dealership will look into the issue on 8/7/2013. Undetermined problem at this time.

- Normal, IL, USA

problem #4

Jul 182013


  • 75,500 miles
Description was mad with complaint no. 10525937 I had entered the wrong type vehicle.

- Tampa, FL, USA

problem #3

Jul 182013


  • 75,500 miles
My daughter was traveling in Louisiana on business, when for no reason the SUV stopped on the interstate she phoned me in tears on the issue, she was stranded on the interstate for a short while. She got it started again after a few minutes. She drove for another few miles and it did it again. She finally made it to a dealer. The dealer ran a test that cost her 125 dollars only to tell her she had a bad electronic throttle body assembly. They informed her that the part was not available and would be days maybe weeks before they could get one. She than returned to her place of stay, that took about an hour because she could take the interstate and had to stop every few miles to restart the engine. What a huge inconvenience and frightened she would be rear ended. I hope a resolution is in the works for this safety issue.

- Tampa, FL, USA

problem #2

Jul 112013

Mariner 6-cyl

  • 51,000 miles
Car went into 'limp mode" at about 25 mph and the orange wrench warning light came on. Had to stop, turned off the engine and then restarted. Warning light went off but it occurred again in about 5 miles. Went to Ford dealer the next day and they could not find anything wrong nor duplicate the problem. Problem happened again a couple of miles after leaving the dealership. I immediately returned to the dealer and they once again couldn't find anything wrong. Two days later on I-95 the car went into "limp mode" the orange light came on and I drove to the side. The traffic was backed up so I was going about 25 mph when this occurred. When I restarted the engine this time, the "wrench" warning light went off but the "check the engine" light came on and remained on. Next day returned to the dealer and this time they said they found the problem and it was the throttle body. In researching on line I found that this is occurring with some frequency and would certainly like to see Ford take responsibility for issuing a defective part. As of now it looks like I will have to pay the bill and hope that the new part is not defective also. It is a real safety issue and hopefully this will be resolved.

- Savannah, GA, USA

problem #1

Aug 252011

Mariner 4-cyl

  • 27,000 miles
Short in left front headlight and for changed light bulb and 10 minutes after parking my car and owning it 1 1/2 months the car blew up.

- New Fairfield , CT, USA

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