Skip to content
WrenchConnect
NHTSA-Verified · Common Problems

2021 Ford Mustang Mach E
Common Problems

Ranked from 169 federal NHTSA complaints. Every problem links to the complaint IDs behind it.

8
Safety
2
High severity
6
Medium
1
Low
8 problems on this vehicle involve a crash, fire, or injury risk. If you are experiencing one, stop driving and have it inspected.

17 Common Problems

Ordered by how often owners reported each one to NHTSA. The bar shows how common a problem is relative to the most-reported on this vehicle. Expand any problem to see the federal complaint IDs.

Sort by
  1. 1

    High Voltage Battery Junction Box (HVBJB) Failure

    43complaints
    Safety riskElectrical

    The HVBJB subassembly in ALL Ford Mach-e vehicles has known defects with 'under-designed' main contactors that are known to fail under normal charging and driving conditions.

  2. 2

    Unintended Acceleration

    32complaints
    Safety riskElectrical

    The vehicle experiences unexpected acceleration, sometimes without the driver’s input.

  3. 3

    Pre-Collision Assist Malfunction

    25complaints
    Safety riskElectrical

    The pre-collision assist system intermittently fails, leading to the loss of adaptive cruise control and lane departure assist.

  4. 4

    Camera System Failures

    23complaints
    Safety riskElectrical

    The front camera system frequently fails, disabling critical safety features like pre-collision assist and adaptive cruise control.

  5. 5

    Powertrain Malfunction

    23complaints
    Safety riskFuel system

    The powertrain malfunctions, causing the vehicle to lose power and become unsafe to operate.

  6. 6

    Vehicle Stalling or Not Starting

    22complaints
    Safety riskElectrical

    The vehicle displays a 'Stop Safely Now' message and becomes unresponsive, preventing the driver from moving the vehicle.

    $150–$1,200est. stalling / shutdown diagnosis + repair · 1–5 hrs labor
    Get local quotes
  7. 7

    Forward Collision Avoidance System Failure

    13complaints
    Safety riskElectrical

    The front camera system fails, leading to the pre-collision assist and other safety features becoming unavailable.

  8. 8

    Recall Non-Compliance

    12complaints
    Medium severityOther

    Owners report difficulty in getting recalls related to visibility and high voltage junction box completed by dealerships.

  9. 9

    Software Update Issues

    10complaints
    Medium severityOther

    Software updates often cause issues such as unintended acceleration and system malfunctions.

  10. 10

    Power Loss During Operation

    8complaints
    High severityElectrical

    The vehicle loses all power and functions, requiring immediate roadside assistance.

    $150–$1,200est. stalling / shutdown diagnosis + repair · 1–5 hrs labor
    Get local quotes
  11. 11

    Battery Issues Leading to Loss of Power

    6complaints
    Safety riskFuel system

    The high-voltage battery junction box failure leads to sudden loss of power, potentially causing the vehicle to stall or accelerate uncontrollably.

    $150–$1,200est. stalling / shutdown diagnosis + repair · 1–5 hrs labor
    Get local quotes
  12. 12

    Lane Departure Warning System Malfunction

    6complaints
    Medium severityElectrical

    The lane departure warning system malfunctions, causing false alerts or no alerts when needed.

  13. 13

    Unexpected Safety Alerts and Malfunctions

    6complaints
    Medium severityElectrical

    The vehicle displays unexpected safety alerts such as 'Stop Safely Now' and malfunctions during operation.

  14. 14

    Steering Wheel Vibrations During Braking

    5complaints
    Medium severitySteering

    Steering wheel vibrations occur during braking between 43-35 mph, causing discomfort and potential loss of control.

  15. 15

    Loss of Propulsion Due to Software Issues

    3complaints
    High severityElectrical

    Software updates introduce issues that lead to sudden loss of propulsion and reduced power during driving.

  16. 16

    Steering System Malfunction

    3complaints
    Medium severitySteering

    The steering system malfunctions, causing erratic behavior and loss of control during driving.

  17. 17

    Visibility and Exterior Lighting Issues

    3complaints
    Low severityOther

    Issues with exterior lighting and visibility, including side mirror folding and windshield resealing problems, leading to potential safety concerns.

    $100–$900est. lighting assembly repair · 0.5–2 hrs labor
    Get local quotes

Other years & sources

2022 Ford Mustang Mach EAll NHTSA complaints for this vehicle →

Data source: U.S. National Highway Traffic Safety Administration (NHTSA) owner complaints and recalls. Problems are clustered and ranked from the complaint record; occurrence counts reflect corroborating complaints, not total incidence. Vehicle image is illustrative. Repair-cost figures are typical U.S. independent-shop ranges (parts + labor) for the class of repair shown — actual quotes vary by region, engine, and diagnosis; always confirm with a local shop.