Diagsheet

2021 Ford Mustang Mach-E · symptom sheet

Engine stalls or loses power while driving

  • 43owner reports
  • 40,400median miles
  • $300median quote
  • 0involved a crash

Newest report Sep 1, 2026 · checked Sep 9, 2026

189 of the 343 complaints on this car are about the electrical system. 43 of those describe stalling.

Tick what matches of 43 reports

17
9
30
3

What got replaced

Owners who name the part that was replaced mention the battery (30 reports).

Recalls and investigations

5 recalls on the electrical system cover the 2021 model year. A recall on the same system isn't always the same failure, so read the defect text.

26V-417Jun 30, 2026
Power Train:Driveline:Differential Unit

Ford Motor Company (Ford) is recalling certain 2021-2023 Mustang Mach E vehicles. The rear differential pinion shaft may fracture.

Risk and remedy
Risk: Differential pinion shaft fracture may result in a loss of drive power, or unintended vehicle movement if the vehicle is in park without the parking brake applied, increasing the risk of a crash.
Remedy: Dealers will repair or replace the rear differential assembly as necessary, free of charge. Interim letters, notifying owners of the safety risk, were mailed July 13, 2026. Additional letters will be sent once the remedy is available, anticipated in late December 2026. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 26S50.
25V-404Jun 13, 2025
Electrical System:Body Control Module:Software

Ford Motor Company (Ford) is recalling certain 2021-2025 Mustang Mach E vehicles. In the event of a low battery charge, the electronic door latches may remain locked once the driver or front passenger exits and shuts the door, possibly trapping someone who is unable to use the inside door release handles, such as a child in the back seat.

Risk and remedy
Risk: The inability to enter or exit the vehicle in an emergency increases the risk of injury.
Remedy: Dealers will update the Powertrain Control Module (PCM) and the Secondary On-Board Diagnostic Control Module C (SOBDMC) software, free of charge. Owner notification letters were mailed to 2021-2025 Mustang Mach-E owners September 12, 2025. Additionally, Owner notification letters were mailed to 2024-2025 Mustang Mach-E owners July 10, 2025. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 25S65.
25V-130Feb 28, 2025
Electrical System:Propulsion System:Traction Battery:Management System/Energy Control Module (Bms/Becm):Software

Ford Motor Company (Ford) is recalling certain 2021-2022 Mustang Mach-E vehicles previously repaired incorrectly under recall number 22V-412. The high voltage battery main contactors may overheat.

Risk and remedy
Risk: An overheated high voltage battery contactor may cause the vehicle to lose drive power, increasing the risk of a crash.
Remedy: Dealers will update the on-board software, free of charge. Owner notification letters were mailed April 11, 2025. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 25S14.
23V-687Oct 13, 2023
Electrical System:Propulsion System:Traction Battery:Management System/Energy Control Module (Bms/Becm)

Ford Motor Company (Ford) is recalling certain 2021-2022 Mustang Mach-E vehicles equipped with an extended range battery. The high voltage battery main contactors may overheat.

Risk and remedy
Risk: An overheated high voltage battery contactor can result in a loss of drive power, increasing the risk of a crash.
Remedy: Dealers will replace the high voltage battery junction box, free of charge. Owner notification letters were mailed December 29, 2023. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 23S56. Vehicles included in this recall that were previously repaired under recall 22V-412 will need to have the new remedy completed.
22V-412Jun 10, 2022
Electrical System:Propulsion System:Traction Battery:Management System/Energy Control Module (Bms/Becm):Software

Ford Motor Company (Ford) is recalling certain 2021-2022 Mustang Mach-E vehicles. The high voltage battery main contactors may overheat.

Risk and remedy
Risk: An overheated high voltage battery contactor may cause the vehicle to lose drive power, increasing the risk of a crash.
Remedy: Dealers will update the on-board software, free of charge. Owner notification letters were mailed on July 8, 2022. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 22S41.

NHTSA investigations into the electrical system on the Mustang Mach-E

EA25-001opened Jan 17, 2025
Electrical · model years 2021 to 2024

Collisions involving ford bluecruise. Open.

NHTSA summary
On April 25, 2024, NHTSA’s Office of Defects Investigation (ODI) opened a Preliminary Evaluation (PE24012) to assess BlueCruise, a partial driving automation system available on certain vehicles manufactured by Ford Motor Company (Ford). NHTSA opened the investigation after the agency received notice of two fatal collisions involving BlueCruise-equipped Ford Mustang Mach-E vehicles. Based on the incidents, NHTSA scoped the investigation to 2021-2024 Mustang Mach-E vehicles equipped with BlueCruise. In June 2024, ODI sent an Information Request (IR) letter to Ford requiring that it provide certain information pertaining to crashes, non-crash reports, and technical specifications that relate to BlueCruise, as well as other Ford partial driving automation systems that offer lane and speed maintenance. In its response to ODI’s IR, Ford stated that there are 2,539,962 Ford and Lincoln vehicles (including subject and peer vehicles) equipped with a partial driving automation system within the scope of the request. The majority of these vehicles are equipped with a system that Ford calls Lane Centering Assist (LCA), which is a hands-on partial driving automation system that combines longitudinal control authority governed by Adaptive Cruise Control (ACC) and lateral control authority governed by a steerable path. LCA is offered on a wide range of Ford and Lincoln models beginning in model year 2019. Vehicles that are equipped with BlueCruise, the focus of this investigation, have
PE24-012opened Apr 25, 2024
Electrical · model years 2021 to 2024

Collisions involving ford bluecruise. Closed jan 17, 2025.

NHTSA summary
On April 25, 2024, NHTSA’s Office of Defects Investigation (ODI) opened a Preliminary Evaluation (PE24012) to assess BlueCruise, a partial driving automation system available on certain vehicles manufactured by Ford Motor Company (Ford). NHTSA opened the investigation after the agency received notice of two fatal collisions involving BlueCruise-equipped Ford Mustang Mach-E vehicles. Based on the incidents, NHTSA scoped the investigation to 2021-2024 Mustang Mach-E vehicles equipped with BlueCruise. In June 2024, ODI sent an Information Request (IR) letter to Ford requiring that it provide certain information pertaining to crashes, non-crash reports, and technical specifications that relate to BlueCruise, as well as other Ford partial driving automation systems that offer lane and speed maintenance. In its response to ODI’s IR, Ford stated that there are 2,539,962 Ford and Lincoln vehicles (including subject and peer vehicles) equipped with a partial driving automation system within the scope of the request. The majority of these vehicles are equipped with a system that Ford calls Lane Centering Assist (LCA), which is a hands-on partial driving automation system that combines longitudinal control authority governed by Adaptive Cruise Control (ACC) and lateral control authority governed by a steerable path. LCA is offered on a wide range of Ford and Lincoln models beginning in model year 2019. Vehicles that are equipped with BlueCruise, the focus of this investigation, have
RQ23-004opened Aug 17, 2023
Electrical · model years 2021 to 2022

High voltage battery contactor failure. Closed dec 6, 2023, led to recall 23V-687.

NHTSA summary
On August 17, 2023, the Office of Defects Investigations (ODI) opened RQ23-004 to investigate instances of loss of motor power due to overheating high voltage battery contactors in model year (MY) 2021-2022 Ford Mustang Mach-E vehicles (subject vehicles). This Recall Query (RQ) was opened after receiving 12 consumer complaints alleging a high voltage battery main contactor failure in subject vehicles that were included in Recall 22V-412 and remedied prior to the reported incidents. The remedy in 22V-412 was a Secondary On-Board Diagnostic Control Module (SOBDMC) software update to monitor contactor temperature and reduce battery power to prevent damage to the contactor, and a Battery Energy Control Module (BECM) software update to monitor contactor resistance to identify an overheated contactor and reduce vehicle power to prevent further damage. On October 13, 2023, Ford filed Recall 23V-687 of 34,762 2021-2022 Ford Mustang Mach-E vehicles produced from May 27, 2020 to May 24, 2022 with recalled Bussed Electrical Center parts NK48-10C666-AA, NK48-10C666-BA, or LK98-10C666-AB. Affected vehicles are equipped with the extended range battery. Ford stated that preexisting damage to the contactors caused by heat and accumulated wear may reduce the effectiveness of the software update remedy in 22V-412. The remedy of 23V-687 is to complete a replacement of the Bussed Electrical Center, or High Voltage Battery Junction Box. In addition, Ford stated that subject vehicles equipped with
DP22-005opened Jan 27, 2023
Electrical · model years 2021 to 2022

Pedestrian alert sounds. Closed aug 7, 2023, led to recall 22V-063.

NHTSA summary
NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that have a gross vehicle weight rating of 4,536 KG or less or are defined as low-speed vehicles. The standard became fully applicable to all such vehicles manufactured on or after March 1, 2021.On January 27, 2023, NHTSA opened Defect Petition (DP) 22-005 to evaluate the subject matter described in the petition. On June 24, 2023 and as supplemented on June 25, 2023, the petitioner notified NHTSA he was withdrawing his petition. The petitioner indicated that, based on his review of data, there is no justification for asserting potential benefits that could be derived from actions sought by my petition. Based on the petitioner's withdrawal, DP22-005 is closed. Closure of this DP does not represent a determination by NHTSA regarding the subject matter of the petition.

What owners paid

5 of the 43 reports quote a price. Each dot is one quote. The middle half runs $250 to $3,000.

$250$300$3,000
$0k$2k$4k$6k$8k

When it happens

The middle half of failures fell between 12,000 and 73,255 miles, from the 10 reports that gave a mileage.

121
2122
723
524
525
426

What owners wrote

“Car stalled once while going to a military appt but started up 3 mins later. Car then made a noise then stalled out of nowhere on the highway at a slow speed in heavy traffic causing anxiety. vehicle then had me stranded waiting for a tow to find out it’s the HVJB .”

Filed Oct 15, 2025

“Driving in a 40mph zone and car suddenly lost all power followed by a message stop safetly now and the 12v battery icon. While coasting car lost power steering and upon stopping went into park and would not go into neutral for 30+ minutes”

Filed Aug 14, 2024

“Ford has installed a sub par HVBJB in my car which was manufactured in 12/01. In lieu of replacing the poorly designed unit they have added software that does not guarantee that the car will not brick. Numerous car have failed and I am afraid of having my wife drive the car at night for fear of it breaking down. This is a ticking time bomb.”

Filed Aug 22, 2023

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

Filed Aug 14, 2023

Should you keep driving it?

This page can't tell you that. 0 of 43 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.

File your own report with NHTSA. Complaint counts are how a problem gets an investigation.

Other problems on this car