Home · 2021 Ford Mustang Mach-e Bev Bev · Complaints

What 334 owners told NHTSA about the 2021 Ford Mustang Mach-e Bev Bev

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (334)Crash / fire / injury (14)Electrical system (147)Driver assistance (104)Transmission & drivetrain (47)Fuel system (46)Speed control (36)Lane Departure (31)Brakes (30)Visibility & wipers (20)Engine (14)Steering (14)

147 of 334 complaints match · Electrical system · clear filters · page 4 of 6

Aug 21, 2023Transmission & drivetrainElectrical systemSpeed control

I had my 2021 Mustang Mach-E updated with the recall software last year. In July of 2022, my High Voltage Battery Junction Box (HVBJB) still failed, giving me a service vehicle soon and SEVERELY reducing power WHILE driving. I was on the freeway and my car just started reducing speed since I was trying to pass someone and I almost hit them. I received the new HVBJB from my dealer and had been fine since. Then a couple of weeks ago, I received the errors AGAIN with this "new and improved" HVBJB that Ford said is more robust and not supposed to fail. Same thing, on the same freeway I commute (73 toll road in California). I was passing someone and the car hit me with all these errors and SIGNIFICANTLY reduced my power. Like 66% reduction. I had to get back into my lane and was able to get back a safe speed but you basically have no power to pass. This is unacceptable. I received the "new" part and yet get a failure AGAIN? On a normal commute, not at the track, accelerating to show off the EV acceleration, just DRIVING! Please make them fix this for real. My dealer said there was a new bulletin that came out after my first repair that has an updated part number, but it is not a true revised part, meaning the internals are actually differnt, it is more a housekeeping part number update due to something as simple as the sticker being in a different spot, some backend thing, etc. There has been no revision to the components that fail since they "fixed" the part back in 2022.

NHTSA ODI 11539777

Aug 21, 2023Transmission & drivetrainElectrical systemFuel system

On Friday 8/18/23 I was driving down a major freeway and my Mach-E jolted violently. I then received a "Stop Safely Now" and "Service Vehicle Soon" message. The vehicle lost all power at this time. Being on a very busy freeway my safety was at risk and I was luckily able to coast over to the right shoulder. The car refused to "start" after pulling over however the 12v battery did work so I was able to use accessories. Once towed to the dealer I was able to confirm a P0AA2 TSB code that indicated that a conductor was stuck open on the high voltage junction box. This was supposed to be fixed by a previous recall software update that FORD uploaded to my car however that was not the case. I am now without a car for 2 weeks but more importantly I am concerned for the safety of other Mach-E drivers as I am reading that this can happen again even after a hardware fix.

NHTSA ODI 11539803

Aug 21, 2023Electrical systemFuel system

After receiving the remedy to NHTSA campaign 22V-412 on Aug 5, 2022 via a Ford Power-Up over-the-air update, my high-voltage battery contactors still overheated and failed on Oct 25, 2022, requiring warrantied replacement by my Ford dealer on Oct 27, 2022.

NHTSA ODI 11539925

Aug 19, 2023Electrical system

This is the second time they have to replace the HVBJB on my car . First time was on 9/2022 and now again on 8/16/2023. the car is in the shop for the same issue.

NHTSA ODI 11539544

Aug 14, 2023Transmission & drivetrainElectrical systemEngine

Powertrain failure- reduced/loss of power High voltage battery warning- unsafe to drive

NHTSA ODI 11538526

Jun 25, 2023Electrical systemEngineCrash

Dealership said no remedy won't fix car but has recall. But when purchased nothing wrong wug car.. everything changed and the whole world is talking in my head saying weird stuff and stealing all my money and the devil acting weird and life just I go through so much and I list nand confused wtf us gong on

NHTSA ODI 11528710

Jun 8, 2023SteeringElectrical systemBrakes

I was driving on the highway (12) in Mandeville, Louisiana and the car (a 2021 all electric Mustang Mach E with only 13k miles) flashed a 'Stop care safely now' sign and then proceeded to power down within 3 seconds of the message. I exited (luckily I was at my exit) and felt the car lose power on the exit ramp. Three signals came up (battery - yet I was at 100% - then a turtle mode and not sure what the third symbol was) and then the car locked up - went into park, would not move or allow me to put into neutral to pull off a very busy highway ramp. I was forced to a dead stop on the ramp (very dangerous). I put on my hazard lights but cars still pilled up all around me, beeping etc. at high rates of speed. I called 911 and the police came out (took about 10 minutes during which time I had to direct traffic around me - again very dangerous) and asked that I move the car but the car would not move or even go into neutral. A DOTD tow truck towed me to a nearby Winn Dixie and then the roadside assistance towed to the Ford Dealer. The Ford Pass app send me the message attached below that said it was forcing a software update and the car would not be able to be used during this update - while the car was in drive and while I was driving it down a four lane highway! Very unsafe considering the car was connected to WIFI at home and that update could have been done at any time - not while driving. There was no notice prior to this that a software update was needed and we have it set for updates to happen at 1 am. The car relies upon software (not firmware) to run and if that fails, the car just locks up. This car should be recalled. I am lucky no one was injured including me trying to direct traffic on a busy high speed highway ramp. The policeman was very frustrated and made me get out of the car. Then the DOTD driver confirmed it would not budge. Thank God this didn't happen while I was in the middle of a 4 lane highway. It would have been like stopping on a train track.

NHTSA ODI 11526050

Jun 6, 2023SteeringElectrical systemSpeed control

Erratic behavior when semi-autonomous Blue Cruise engaged. Fault may be due to failures/malfunctions in side view mirror camera modules.

NHTSA ODI 11525546

May 3, 2023Electrical systemLightsDriver assistance

I have been having an intermittent warning error saying my front camera is faulty and my lane assist is no longer operational. The error seemed to come and go with bumps. Here recently it has become permanent around the beginning of April 2023, and I no longer have functionality of many safety features including adaptive cruise control, regular cruise control, lane assist, crash prevention warning, automatic braking, or even regular cruise control (if I try to turn off the adaptive cruise in the settings regular cruise control still does not work), automatic bright lights don't work. I have been trying to get this resolved since I purchased the car but despite a dozen or so trips to the dealership I cannot seem to get it fixed. I've attached a screenshot of some of the dozens (hundreds?) of error messages I have received through the Ford app with the car, which note pre-collision assist is not available. It does not seem safe to have so many safety features non-operational.

NHTSA ODI 11520294

Mar 11, 2023Transmission & drivetrainElectrical system

I went to start the vehicle and it gave me a red warning "stop safely now". It was already stopped and would not start at all. It had plenty of charge on the battery pack. It's been at the dealer for nearly two weeks and they have had to order the HVJBC, I believe. I am fortunate that it didn't fail while driving or parked in a place which was inaccessible to a tow truck. The forum I read recommended making a report. This seems to be an all to common problem with this car and can lead to sudden acceleration or deceleration while in motion. Had had received an earlier yellow warning for "service vehicle soon" and took it to the dealership and they assured me they had updated all the software (in the hopes of preventing the "stop safely now" problem). Obviously, that didn't work.

NHTSA ODI 11511316

Mar 10, 2023Electrical systemSpeed controlFuel system

Unintended acceleration from a stop when pushing accelerator. Has happened 2 times in the last 2 days. I touched the throttle from a stop 2 time and it took off like I put the accelerator to full throttle (which I didn’t). Very dangerous situation in parking lots or around pedestrians. I have scheduled an apt with my local dealer.

NHTSA ODI 11511215

Mar 6, 2023Electrical system

The contact owns a 2021 Ford Mustang Mach E. The contact stated that the vehicle was previously repaired under NHTSA Campaign Number: 22V412000 (Electrical System) however, the failure recurred. The contact stated that while driving at an undisclosed speed, the park safely warning light was illuminated and the vehicle stalled. Additionally, the steering wheel seized. The vehicle was towed to the dealer; however, the dealer was unable to duplicate the failure. The manufacturer was made aware of the failure. The failure mileage was approximately 35,000.

NHTSA ODI 11510437

Feb 15, 2023Electrical systemSpeed controlDriver assistance

The car shows front camera fault disabling all collision safety features as well as cruise control.

NHTSA ODI 11507431

Feb 6, 2023Electrical systemFuel system

Ford released an OTA update for the HVB issue Mach-E were having and leaving drivers stranded. I have seen that even with the update many people are still having the cars break down while driving and needing the High Voltage Battery Connector replaced. I am worried that this may happen to my car one day while driving and could cause an accident or death. Is there anyway to force Ford to fix every car that had this issue before we break down? The temporary fix of software is not good. I think FOrd should be forced to recall all Mach-E and replace the connector before there is an accident that leads to deaths on the road.

NHTSA ODI 11505796

Jan 20, 2023Electrical system

The contact owns a 2021 Ford Mustang Mach-E. The contact received notification of NHTSA Campaign Number: 22V412000 (Electrical System) however, the part to do the recall repair was not available. The contact stated that several local dealers were contacted; however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

NHTSA ODI 11502773

Jan 12, 2023Electrical system

Occasional blank/inoperative info screen, typically recovers after reset or re-start, but sudden loss of visibility of ALL settings and controls for heat, navigation, and most importantly loss of the ability to enter backup Start code for keyless start can cause possible stranding in dangerous conditions. Loss of control of heating/cooling could cause loss of visibility if defrost is unavailable, or heat stroke if air conditioning is unavailable. My understanding is that re-designed console screens are available to address this known defect in vehicles built prior to June 2022, but no recall has been issued.

NHTSA ODI 11501452

Jan 6, 2023Electrical system

Ford has failed to take corrective action regarding their Safety Recall Notice 22S41 ( high voltage battery main contactors may overheat and remain open or weld closed). They have not supplied the program updates NEITHER by Wi-Fi or vehicle modem via Automatic Updates for which my vehicle is set up to receive NOR by way of the Ford dealership (Brewster Ford, Brewster, NY) having possession of my vehicle for THREE (3) full days. They are simply unable to remedy Safety Recall Notice 22S41 endangering my family and I. Please take whatever action that you are allowed to fixed the problem before someone gets hurt. Thank you.

NHTSA ODI 11500500

Dec 14, 2022Electrical systemVisibility & wipers

The contact owns a 2021 Ford Mustang Mach-E. The contact received notification of NHTSA Campaign Number: 21V711000 (Visibility) and 22V412000 (Electrical System) however, the parts to do the recall repairs were unavailable. The contact stated while driving 60 MPH, he received a warning from the manufacturer app of a high voltage spike and that the vehicle would shut down. The contact exited the highway and pulled into a parking lot where the vehicle shut down. The contact could not restart the vehicle. The contact stated that there was no warning light illuminated. The contact had the vehicle towed to a dealer however, the vehicle was not diagnosed. The mechanic was able to restart the vehicle. The mechanic was unable to duplicate the failure. The contact drove the vehicle to his residence; however, the high voltage spike failure recurred. The contact had the vehicle towed back to the same dealer. The contact was informed that there was damage to the battery metal shielding on the passenger’s side, toward the center of the vehicle. The dealer stated that there were two holes and determined the damage was due to the vehicle striking an object. The dealer stated that since the damage was caused by the vehicle operator, the NHTSA Campaign Number: 22V412000 (Electrical System) could not be performed. The failure mileage was approximately 7,000. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repairs. The manufacturer was made aware of the issue. Parts distribution disconnect.

NHTSA ODI 11497493

Nov 10, 2022Electrical systemSpeed controlBrakes

* On October 16th, 2022, at about 7:00 pm, I was driving my 2021 Ford Mach-E GT when we began to change lanes (we were in the left lane heading East) as the vehicle in front of us slowed down to make a left-hand turn. There was a car behind us and two vehicles in the right lane (two-lane road in each direction) that were a few car lengths behind us as we began to change into that lane. When I turned on my signal and turned the steering wheel, I pressed the gas pedal to accelerate to get around the car in front of me to keep my distance from the vehicles in the lane I was transitioning into. Unfortunately, when I pressed the gas pedal, we experienced complete vehicle failure. I had no steering, brakes, or acceleration. Within a short time (30-45 minutes), we had no power as the lights on the vehicle, and all electrically powered devices and components were entirely out. This made it very difficult to tow the car as it is all-wheel drive, and we could not put it in Neutral to pull the vehicle. As this happened, five cars were in the area, and several had to swerve and fly off the road onto the dirt shoulder. We barely missed the car in front of us, and the car behind us had to lock up its breaks not to hit us. Our car gradually slowed down and cost off the road about 50 yards or so after losing power, as it was very difficult to get the vehicle to steer; it took everything I had to turn the wheel to get it off the road. We put on the emergency blinkers, but the vehicle lights flashed erratically inside and outside the car. We had over a dozen warnings flash on our dashboard about vehicle failure. The speakers in the car were making a thumping sound on their own as the car was flashing headlights, brake lights, and flashers on their own and very sporadically. It was like a disco club in the car as all the lights were flashing on and of at a rapid rate. The other cars stoppe and were very angry at us as the screamed at us that we almost caused an accident.

NHTSA ODI 11493140

Oct 20, 2022Electrical system

HVBJB failure, vehicle lost power and threw an error “stop safely now”; will not drive

NHTSA ODI 11490230

Oct 19, 2022Electrical systemSpeed controlCrash1 injury

The contact owns a 2021 Ford Mustang Mach-E. The contact stated that while her mom was driving, the vehicle accelerated without warning. The electrical system was inoperable. While the contact was driving at low speed in a parking lot approaching a stop sign, the vehicle accelerated. The brake pedal was applied but the vehicle continued to drive and crashed into a Toyota 4 Runner. The air bag deployed and impacted the driver in the face and she sustained knee injuries and cuts on her stomach and blood in her stool. A police report was filed. There were no reported fires. The vehicle was towed to an independent collision center. The vehicle was taken previously to the local dealer where the hardware was updated and a reboot was completed. The vehicle was repaired but the failure persisted. The manufacturer was not contacted. The failure mileage was unknown. The VIN was not available.

NHTSA ODI 11490039

Sep 25, 2022Electrical systemFuel system

HVBJB failure

NHTSA ODI 11486295

Sep 22, 2022Electrical system

My 2021 Mustang Mach-E GT Performance is exhibiting a Powertrain Failure and Stop Safely Now message in the instrument panel cluster (IPC). It is due to a high voltage battery junction box (HVBJB) failure. Ford needs to replace the HVBJB with an updated part and reprogram the BECM, at least. The dealer has no information on the replacement part, and has not associated TSB 21-2178 with the vehicle.

NHTSA ODI 11485919

Sep 14, 2022Electrical systemEngine

Have had 2 separate incidents in which while driving down highway, car switched into slow mode, powering down and ultimately coming to a stop. Had to call 911 both times to get to safety; it was very scary. Car is at dealer for 2 weeks as of today. Believe this is a battery problem which has been identified in lots of other vehicles

NHTSA ODI 11484416

Aug 15, 2022Electrical systemEngineFuel system

My vehicle has 13,000 miles on it and I have been driving it without any problems until August 12, 2022 when I turned the vehicle on and there was "service now" and a "Battery service" message. I was aware of this problem because it was posted online and Ford has sent me mail about this problem but I thought it could be fixed by an over the air update, which I performed already. So I contacted the nearest dealer to book an appointment to remedy this issue but the next available appointment was on August 31st so it was 2 weeks from then. I decided to give it a shot and drive it and I was able to drive approximately 40 miles before the car shut down as I was turning right on a stoplight on my way to work. The propulsion did not work along with a series of multiple error messages on all systems. I was able to bring the car to the side of the road, in front of a tire service company's parking lot. I tried to start and restart it but to no avail. I called the nearest Ford dealership and they accepted my vehicle so I called a towing service to tow my vehicle to them. I decided to step out of the vehicle and inform the establishment about the situation and that I called a towing service already. When I tried to get in, the doors did not work anymore so I was not able to get in. The towing service arrived and told me to put my car to neutral gear so she can pull it up the bed of the tow truck. I said I could not get in and she stated that she might damage the vehicle if she tried to pull it while it is on park. I had no choice but to agree because I cannot get in the vehicle to change the gear. She had me sign a waiver that states that I accept any possible damages that the vehicle might incur during the towing process. She was able to get the vehicle on the tow truck and deliver it to the dealership I mentioned and now they are trying to repair it. I was aware of this issue beforehand but Ford stated that this issue can be resolved with a simple software update.

NHTSA ODI 11479421

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Working with the data? Download all 334 complaints as CSV · fetched from NHTSA July 19, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2021 Ford Mustang Mach-e Bev Bev verdict →