Which parts fail
Components named in complaints (automatic and manual transmissions, CVT, axles, driveshaft, 4WD/AWD).
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).
The contact owns a 2012 Ford Mustang. The contact stated that while driving at 60 MPH, the vehicle started to jerk and downshifted. The contact then stated that the speedometer and RPM's started to fluctuate rapidly. All the warning lights were illuminated. As a result, the contact crashed into a metal road post and a tree. No injuries were sustained. No medical attention was required. A police report was filed. The vehicle was towed to an independent mechanic where it was diagnosed that the transmission seized and needed to be replaced. The contact was informed by the mechanic of the NHTSA Campaign Number 16V248000 (Power Train). The vehicle was not repaired. The dealer was not notified of the failure. The manufacturer was notified however, the contact was unsuccessful. The 90,000.
The contact owns a 2012 Ford Mustang. The contact stated while driving 60 MPH, the rear wheels locked up and the speedometer displayed 0 MPH. The vehicle started sliding sideways, causing the contact to almost lose control of the vehicle. The contact was able to veer to the side of the roadway. The contact then pulled into the nearest gas station, parked, and turned off the vehicle. The contact resumed driving; however, the failure reoccurred while driving 40 MPH. The vehicle was towed to an unknown dealer who informed the contact that they could not diagnose the vehicle as the transmission specialist was not available. The contact drove to his residence. The vehicle was towed to a second dealer where it was being diagnosed. The vehicle was not diagnosed or repaired. …
The contact owns a 2012 Ford Mustang. The contact stated that while driving 55 MPH, the transmission unexpectedly downshifted to first gear and the vehicle's rear tires ceased. Additionally, the speedometer failed. The air bag warning light, the traction control warning light and the check engine warning light were illuminated. The contact used an OBD reader and read the DTC code P0720. The contact related the failure to NHTSA Campaign Number: 16V248000 (Power Train). The vehicle was not diagnosed nor repaired by an independent mechanic or a dealer. The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA Hotline. The failure mileage was approximately 67,000.
The contact owns a 2012 Ford Mustang. The contact stated while driving at undisclosed speeds, the vehicle started stalling. The contact pulled over to the side of the road; however, the vehicle failed to restart. The vehicle was towed to the dealer and was diagnosed with transmission range sensor failure. The vehicle was not repaired. The contact discovered NHTSA Campaign Number: 12V190000 (Power Train, Exterior Lighting) however, the VIN was not included. The manufacturer was made aware of the failure. The failure mileage was approximately 180,000.
The contact owns a 2012 Ford Mustang. The contact stated that after starting the vehicle and shifting into the drive and reverse, the vehicle would no drive forward or move backward. The cause of the failure was not yet determined. The manufacturer was notified of the failure but no assistance was offered. The local dealer was not notified. The failure mileage was 130,000.
Transmission seems to lose power while driving, the car will barely pull itself but the rpms increase if I accelerate. This has happened several times while driving and occasionally there are dash lights lighting and speedometer/gas gauge doesn't work but that doesn't happen every time. When it happens I pull over and shut it down and restart and it runs correctly until it happens again! I do a lot of highway driving and the car just "falling flat" on a multi-lane highway at 70+ mph is definitely a safety issue! I have taken it to my local fastlane shop and the car was driven but didn't malfunction at that time. He advised me to try to drive it there if it happened again, but I have never been close to the shop at the times it happens or they are closed. There is no advance warning, it happens at various speeds and even on takeoff after stopping for traffic lights. …
Recently started having erratic shifting issues. Will downshift randomly out of nowhere while driving. Sometimes will just be stuck in 1st gear and won't go anywhere until I pull over and shut off/start up again. Dangerous because I never know when it will do it. Might seem like everything is fine and then all of a sudden, it downshifts and loses power. Rpm's rise but car has no power. Have to figure out how to get out of the way. As stated in ford's " Customer Satisfaction Program 16N02," my 2012 has all the symptoms and I have DTC code P0731 but dealer refused to service my vehicle because it doesn't show up with my VIN, even though it's a 2012 and I clearly need my Molded Leadframe replaced.
Transmission unexpectedly slipped gear while driving at a steady pace in traffic. Caused RPMs to rev high and loud, with inability to control speed suddenly. Had to quickly pull over and turn off car. After waiting a few minutes, was able to restart car and continue driving without issue. This has happened 3-4 times now. Took to my local mechanic who stated there is an issue with a sensor inside the transmission. Spoke to my Ford dealer I purchased the car from, and was informed that this is a known issue occurring with many 2012 Form Mustangs, and they expect a recall to be announced shortly.
Tl* the contact owns a 2012 Ford Mustang. While driving 70 MPH in the left lane, the vehicle shifted into first gear and seized the rear tires while on an incline. The contact crashed into a guard rail on the driver side. The air bags deployed. A police report was filed that accused the contact of careless driving. The contact sustained bruising on the left side of the ribs, but medical attention was not required. The vehicle was taken to an independent mechanic and repaired. The failure mileage was approximately 16,150. Updated 10/28/16 the output speed sensor in the transmission from 70 MPH in 6th gear to first and pushed the consumer down an incline into a guard rail. The consumer attached the recall letter to his complaint, regarding an issue with the output speed sensor. Updated 11/0/16.
After waiting at a light in the left turn lane, I started accelerating from a complete stop, slowly into my left turn. At almost completion of the turn, my tachometer went from 3000 rpms to over 6000 rpms. The car had a sudden jolt at this moment and the rear wheels locked up. I went into a slide and the car slid across 2 lanes into a tree filled median. The car was totaled by the insurance company. There were no factors that could influence such a crash, as the road was dry, it hadn't rained. The road was well paved. Finally, speed wasn't a factor in the crash. At the time of the accident we had no idea what could have caused the downshifts in gears, however after a recent recall we realized what had happened.
Related recalls
Power train › Automatic transmission
Ford Motor Company (Ford) is recalling certain model year 2011-2012 Ford F-150 trucks, 2012 Ford Expedition, Lincoln Navigator, and Ford Mustang vehicles. The affected vehicles are equipped with an automatic transmission that may unexpectedly downshift to first gear, regardless of vehicle speed.
Remedy: Ford will notify owners, and dealers will reprogram the powertrain control module with updated software, free of charge. The recall began on September 19, 2016.
NHTSA investigations
Inability to shift gears on acceleration
The Office of Defects Investigations (ODI) analyzed complaint data provided by Ford as well as complaints submitted to ODI from consumers.In total, there were 364 unique reports indicating various shift quality issues while driving.Ford identified several factors that may contribute to shift quality concerns in the subject vehicles, including cold transmission, clutch stay-out at high engine speeds, gear clash or…
Transmission complaints in other Mustang years
Frequently asked questions
How common are transmission problems on the 2012 Ford Mustang?
NHTSA has 177 complaints about the transmission & drivetrain of the 2012 Ford Mustang, 38% of the model year's 469 complaints. The component named most often is manual transmission (20 mentions).
Is there a recall for 2012 Ford Mustang transmission problems?
Yes — NHTSA recall 16V-248 (automatic transmission, Apr 27, 2016). Recall repairs are free at authorized dealers.
At what mileage do 2012 Ford Mustang transmission problems start?
Half of the complaints with a recorded mileage happened before about 13,000 miles, and 60% before 25,000 miles.
Is it dangerous?
Owners linked 8 crashes, 0 fires and 3 injuries and 1 death to transmission & drivetrain 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.