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:
2 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
26,742 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.

2012 Ford Mustang engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2012 Ford Mustang:

Unsubscribe any time. We don't sell/share your email.

2012 Ford Mustang Owner Comments (Page 1 of 2)

problem #21

Dec 022016


  • 17,115 miles


The contact owns a 2012 Ford Mustang. While driving approximately 45 mph and merging onto an interstate, the vehicle failed to accelerate when the accelerator pedal was depressed. Also, the gear shifter failed when the contact attempted to shift into fifth gear. The vehicle was pulled over to the side of the road, restarted, and driven to the dealer. The vehicle was not diagnosed or repaired. The manufacturer was notified. The approximate failure mileage was 17,115.

- Kings Port, TN, USA

problem #20

Sep 162016


  • 70,000 miles
The contact owns a 2012 Ford Mustang. The contact stated that the vehicle experienced a complete loss of power and the maintenance warning indicator illuminated. The vehicle was taken to the dealer where it was diagnosed that the electronic throttle body was defective and needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 70,000.

- Roseville, CA, USA

problem #19

Jul 012016


  • 58,000 miles
The contact owns a 2012 Ford Mustang. The contact stated that the vehicle randomly stalled without warning. The contact was able to get the vehicle to restart, but it stalled more than three times afterwards. The vehicle was taken to a dealer where it was diagnosed that the throttle body needed to be replaced. The manufacturer was notified of the failure and provided no remedy. The approximate failure mileage was 58,000.

- Fort Lauderdale, FL, USA

problem #18

Dec 212015


  • 7,700 miles


The contact owns a 2012 Ford Mustang. While pulling into a parking space at a very low rate of speed, the vehicle suddenly experienced unintended acceleration. The vehicle crashed into a pole and a building. No injuries were reported and a police report was filed. The cause of the failure was not diagnosed. The vehicle was towed and not repaired. The manufacturer was notified of the failure. The failure mileage was 7,700.

- Riveira Beach, FL, USA

problem #17

Jan 182016


  • 59,000 miles
My vehicle constantly goes into limp home mode while driving. Turns off all cylinders except 1 which let's you drive about 5mph. Also while my vehicle is at idle it begins to loose proper idle RPM and nearly stalls until revs back to a higher RPM. After some research I found that the issue is thought to be the throttle body and throttle body sensor. Currently mymy vehicle is at the dealership going through some vehicle diagnostics to figure out the exact problem. They told me it is not covered under the vehicle warranty and I am being charged $145 for the initial inspection and then charged by the hour to fix the problem, I not including parts. My vehicle only has 59,000 miles on it and it's already failing. It appears that numerous people are have this issue and Ford has yet to recall affected vehicles.

- Vacaville, CA, USA

problem #16

May 092015


  • miles
Was driving around 50mph on city streets when all of a sudden car lost power and went limp. Wrench light came on and car was making a weird noise under the hood like it was struggling. Couldn't accelerate and I had to coast to the right hand side of the road. Turned the car off and then back on and everything was okay. This has happened 3 times since within a 8 month time period driving at various speeds. Each time I turn the car on & off again and it seems to reset. I've noticed my car hasn't been getting the same city mpg as before. Ive only had this car 2 years, I'm the second owner and this started at roughly 62,000 miles.

- Fresno, CA, USA

problem #15

Oct 222015


  • 18 miles


Wrench light comes on, followed by check engine light. Car goes into fail safe mode, down to about 2 mph; rpms fluctuate dramatically. Happens on the highway, and during normal street driving. Seems to be in the throttle, the same thing as in the recalled Ford Focus throttle plate actuator.

- Metairie, LA, USA

problem #14

Oct 202015


  • 2 miles
My car would die while driving. It was very dangerous in heavy traffic and would have to turn the car off and back on just to crawl into a parking lot, so I had it towed and the computerized engine diagnostics at the Napa auto care center showed a malfunction of the throttle body.this repair cost me $726.32

- Fort Myers, FL, USA

problem #13

Oct 072015


  • 56,000 miles
I was driving in the expressway at 60 mph when suddenly my car lost power on the acceleration. A wrench tool appear and the dashboard on the RPM clock... at that moment the car desaccelerate almost to 30 mph and I was unable to gain speed. I went to a side of the road, turn it off and restarted the car. Everything appear to be normal but the first thing I did was go to the dealer. They run a test on it and told me that the problem was related to the electeic throttle body. I dont understand how is possible to happend something like that when my car barely has 4 years. There is no warranty on ot and the repair for it is really expensive.

- Miami Lakes, FL, USA

problem #12

Jul 202015


  • 60,000 miles
While entering the freeway in rush hour traffic, my car went into "limp mode", the wrench light came on as did the check engine light. I had to pull over on the shoulder of the freeway, turn the engine off and restart it. This has happened a couple of times in the past couple of days- mostly while driving on the freeway. It is very scary to be driving on a houston freeway, have this happen and need to safely maneuver a vehicle to the shoulder of the freeway, often crossing several lanes of traffic when vehicles are moving at 40-55 mph and I have no ability to accelerate. I have also had to stop in the middle of the freeway to restart my car because I was not able to safely change lanes. It was a terrifying experience and I was afraid I would be re-ended by motorist driving at posted speeds. When researching this issue, along with the mariner's, escapes, Focus etc, I have found that many Ford Mustangs have this same problem. Given that this is a very dangerous condition, the cost involved in replacing the throttle body, and most importantly, Ford's long history of vehicles with defective throttle bodies, I do not understand why the 2012 Mustang or any other Ford product with this issue are not automatically eligible for the "customer satisfaction program" which fixes the problem. I do not trust this car and no longer feel safe in it.

- Houston, TX, USA

problem #11

Oct 202014


  • 19,000 miles


Entering into traffic, the car will go into limp mode. There was no response from the gas pedal and the car just cruzed at a snail pace. Very dangerous situation, as the traffic was moving and I barely moved out of the way. Since, I had 4 occurrences and taken it to the dealer. They will not work on the car unless the check engine sign stays on. The car computer will reset everytime you start the car. I had the car tow to the dealer the first time and subsequent events, but as I mentioned the dealer did not wanted to recognize the situation.

- Miami, FL, USA

problem #10

Sep 042014


  • 39,000 miles
At approximately 60 mph on I-295 in moderately heavy traffic, there was an audible "clunk" and vehicle immediately began decelerating. Pressing on the gas pedal did not power the vehicle. Driver was already in the far right lane preparing to exit, so safely made it to the shoulder. Had driver been in another lane, there would be significant risk of collision as the vehicle lost power so quickly. Vehicle was towed to Ford dealer, who reported that the throttle body had failed. Ford denied that throttle body failure was a common issue with the Mustang, although it has been in several other Ford models.

- Jacksonville, FL, USA

problem #9

Jun 112014

Mustang 6-cyl

  • Automatic transmission
  • 41,000 miles
The contact owns a 2012 Ford Mustang. The contact stated while driving approximately 70 mph the vehicle suddenly lost power. After turning the vehicle off and restarting it the vehicle functioned normally. The contact indicated that the failure occurred multiple times. The vehicle was taken to an independent mechanic who diagnosed that the throttle body assembly was defective. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was 41,000. Updated 09/02/14 updated 09/8/2014

- Orlando, FL, USA

problem #8

May 022014


  • 41,000 miles
The contact owns a 2012 Ford Mustang. While driving approximately 60 mph, the speed decelerated to 10 mph and the vehicle stalled. The vehicle was able to be restarted and operated normally. The failure occurred multiple times. The vehicle was taken to a mechanic who stated that the throttle body assembly was defective. The vehicle was repaired and the manufacturer was notified. The failure mileage was 41,000.

- Orlando, FL, USA

problem #7

May 092014


  • 44,354 miles
During acceleration to pull into traffic on a hwy with vehicles approaching at 80 mph my gas throttle stuck after I reached the speed of 60 mph. The pedal pulled away from my foot accelerating rapidly. I tried to tap pedal to release it but it just stuck. I quickly hit the brake and it finally released. I had been traveling with the cruise on prior but this occurrence, but I had been stopped for 5 minutes. I plan to inform my Ford lot next week when I get the oil changed.

- Mcdade, TX, USA

problem #6

May 172013

Mustang 6-cyl

  • 20,500 miles
I turned right at traffic signal into a merge lane and accelerated to approximately 45 mph and merged left. At this point the car started jerking and making a loud noise. I placed my foot on the brake petal and could feel the brakes being activated, the car lost power and continued the jerking for approximately 200 yard. Other cars behind me began blowing their horns. I do believe some of the dash light came on but at the time I was concerned about staying on the road and was not looking too closely at the dash. The second incidence was on Jan. 16, 2014. All this was reported to the Ford dealer. They were unable to duplicate the incident and offered no help.

- Macon, GA, USA

problem #5

May 012013

Mustang 6-cyl

  • 16,000 miles
Upon taking off from a stop light car stalled and lost all engine power. Car started again but stalled just as guiding to breakdown lane on overpass. Had to have car towed to Ford service where they determined it was a bad throttle body. Throttle body was replaced. Ford service spoke of known issues with the throttle body in Focus models but was not aware of any throttle body issues with Mustang.

- Casselberry, FL, USA

problem #4

Sep 252013


  • 11,293 miles
The contact owns a 2012 Ford Mustang. The contact stated that while driving various speeds, the vehicle suddenly stalled. The contact also stated that while parked, the vehicle rolled away. The vehicle was taken to the dealer where it was found that the throttle body needed to be replaced. The vehicle was repaired. The manufacturer was not contacted about the failure. The failure mileage was 11,293.

- Bayamon, PR, USA

problem #3

Apr 042012

Mustang 8-cyl

  • 500 miles
When attempting to shift from 1st to 2nd on my 2012 Ford Mustang GT manual, often times I am unable to shift into 2nd gear and the vehicle makes me shift info 4th gear. This causes the engine to get bogged down and causes me to lose acceleration speed. Usually I have to then shift again out of 4th and into 2nd. I have almost been hit from behind several times when this has happened as the engine gets so bogged down in 4th that I can't even keep up with traffic, especially when merging onto the freeway. This usually occurs once about every 10 miles of city driving.

- Irvine, CA, USA

problem #2

Apr 302012

Mustang 8-cyl

  • 500 miles
Issue # 1 brakes: Upgrade "brembo" brakes squeaked about 2 weeks out the dealership. Took it a total of 4 times and dealer could not find the issue, the 5th time, I drove the vehicle and showed service advisor and tech. According to dealer the rear brakes were replaced. The next day, brakes are still squeaking, take it back to dealer where it was repaired a second time, picked up the car, on the 4th day, I was coming to slowing down ready to brake, pushed the clutch and car jolted forward (as if I pushed the gas and let go of the clutch). I did not think anything of it, 5 minutes later, the car started grinding, noise was only heard when driving and would stop as the vehicle came to a stop. A few days after that I was moving car forward, in my driveway, put in first gear, clutch in, as I slowly released the clutch (never touched the gas), and as I tried to brake, the vehicle did not stop, clutch engaged, pushed the brake as hard as I could the car kept moving as if there was pressure on the gas pedal, ended up hitting our SUV parked in front, car still did not stop, actually pushed SUV about 10 feet forward, until I turned off vehicle and used the hand brake. Issue # 2 A/C - when driving the air would come on randomly, full blast, the screen would show exterior temperature at 00, 2 fans would come on, one on each side of the screen displaying 88 degrees (vehicle is not equipped with dual air controls ). this happens random and in the past 4 months I've had the car I have experienced this issue 3 times. - dealer cannot find the problem.

- Bellflower, CA, USA

Read the next 1 complaints »

Not what you are looking for?