Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2012 Ford Mustang owners, lightly cleaned up (personal details are redacted by NHTSA).
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. …
While merging on a local highway at 15 MPH the wrench warning light came and the car went into limp mode. I was lucky the right hand lane had break in traffic and I was able to get off the road. The limp turned in no acceleration and was unresponsive to the gas pedal. I turned the car off and waited 1 minute and restarted the car - everything was back to normal. I drove directly to my mechanic and had him scan for codes. No codes were found. He ran numerous other checks and drove the car for 60 miles with no problems. This is the second time the wrench warning light has come on in the last 3 weeks. The first time nothing happened as the car did not go into limp mode. The car was scanned then also with no codes showing. I was fortunate not to have been hit.
My car has approximately 31000 miles on it. I"m the second owner of this vehicle. 18 days ago antifreeze was on my garage floor. My mechanic come over and explained to me that my water pump had gone bad. So I took my car to the dealership and they told me that it was still was under power train warranty. They diagnosed my car and verified that it was indeed the water pump and that there was another person that was waiting ahead of me for the same thing 30 days. I called other dealerships and they too were out of water pumps. My concern is that I will have to keep buying anti freeze every other day and I cannot afford this. This dealer ship told me that they did not have a loaner vehicle for me. Please help. Thank you.
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.
During initial acceleration after a left turn, shifting from 1st into 2nd gear, the vehicle shook wildly and violently rocked side to side and lost power. This was the second identical occurrence on city streets while accelerating out of left turns. On both occasions, had to make immediate moves to the right lane before power was restored. Based on other reporting and research, it appears to be an issue of throttle body failure. The vehicle has 18,500 miles and has a mt-82 transmission.
Tl* the contact owns a 2012 Ford Mustang. While driving approximately 60 MPH, the wrench warning indicator illuminated and the vehicle lost acceleration. The contact pulled the vehicle off the road and turned off the engine. Once restarted, the vehicle performed normally. The failure recurred. The dealer diagnosed that the throttle body failed and needed replacement. The vehicle was repaired. The manufacturer was notified of the failure. The approximate failure mileage was 39,198.
Tl* 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.
Tl* 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.
Tl* the contact owns a 2012 Ford Mustang. While driving various speeds, the wrench sensor and check engine sensor indicators suddenly illuminated. The vehicle also failed to accelerate normally. The cause of the failure was not diagnosed. The vehicle was not repaired. The manufacturer was not notified of the failure. The VIN was not available. The failure mileage was 80,000.
Tl* the contact owns a 2012 Ford Mustang. The contact stated that the vehicle stalled without warning. The vehicle was taken to the dealer where the technician diagnosed the electronic throttle body needed to be replaced. The repair was made to the vehicle. The manufacturer was made aware of the failure. The failure mileage was 29,000.
Engine complaints in other Mustang years
Frequently asked questions
How common are engine problems on the 2012 Ford Mustang?
NHTSA has 33 complaints about the engine & cooling of the 2012 Ford Mustang, 7% of the model year's 469 complaints.
Is there a recall for 2012 Ford Mustang engine problems?
No. NHTSA lists no engine & cooling recall for the 2012 Ford Mustang, though it has 6 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2012 Ford Mustang engine problems start?
Half of the complaints with a recorded mileage happened before about 30,000 miles, and 45% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 0 fires and 0 injuries to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.