IsItAGoodCar

Common Problems with the
2021–2023 Ford Mustang Mach-E

We've identified 4 known issues that can affect the 2021–2023 Ford Mustang Mach-E. 1 of these are serious faults that could be expensive to repair.

4
Known Issues
1
Serious
1
Moderate
2
Minor

The 2021–2023 period has 3 more issues than the Ford Mustang Mach-E average across all year periods.

All Known Issues

High Voltage Battery Junction Box (HVBJB) Failure

SeriousElectrics & Electronics

The main high-voltage contactors can overheat and weld shut or stick open, especially after rapid acceleration or DC fast charging. This results in a sudden loss of motive power.

Most affected: AWD, Extended Range, GT

Estimated cost: £0 (Under Warranty/Recall)Affects: 2021–2023

Typical symptoms

  • •"Stop Safely Now" message
  • •Total loss of drive
  • •Car refuses to charge

What to inspect before you buy

  • ✓Verify with a Ford dealer if the HVBJB recall campaign has been completed for that specific VIN

Charging System Faults and 12V Battery Issues

ModerateElectrics & Electronics

The Mach-E relies on a small 12V auxiliary battery to power the charging contactors and control modules. If the 12V drops below 11.5V, charging will not start even though the main battery is full. Charge port actuator failures and onboard charger faults also cause charging to fail or stop mid-session.

Most affected: All models

Estimated cost: £60-£500Affects: 2021–2024

Typical symptoms

  • •Unable to charge or Charging fault message
  • •Charge port door will not open
  • •Charging stops mid-session
  • •12V battery low warning

What to inspect before you buy

  • ✓Check 12V battery health and age
  • ✓Test charge port door operation
  • ✓Verify FordPass app connectivity
  • ✓Try charging at a public and home charger

Software and SYNC 4A Infotainment Glitches

MinorElectrics & Electronics

The 15.5-inch touchscreen may freeze, go blank or lag badly, temporarily knocking out climate control and drive-mode controls. Apple CarPlay audio can cut out, rearview cameras can freeze and driver-assistance features can temporarily go offline.

Most affected: All models

Estimated cost: £0-£400Affects: 2021–2024

Typical symptoms

  • •Frozen or black central screen
  • •Apple CarPlay audio cutting out
  • •Rearview camera freezing
  • •Driver-assistance messages disappearing

What to inspect before you buy

  • ✓Run navigation, audio and phone pairing during the drive
  • ✓Check current software version
  • ✓Ask if OTA updates have been applied successfully

Build Quality and Wind Noise

MinorBodywork & Rust

Early Mach-E builds drew criticism for inconsistent panel gaps, wind noise around mirrors and A-pillars at highway speeds, paint imperfections and interior creaks and rattles. By 2024 Ford factory processes had improved but these issues still show up in the used pool.

Most affected: All models, especially early 2021-2022 builds

Estimated cost: £0-£500Affects: 2021–2024

Typical symptoms

  • •Wind noise around mirrors or A-pillars at speed
  • •Creaky dashboard or buzzing door panels
  • •Uneven panel gaps or paint imperfections
  • •Hatch-area rattles over rough roads

What to inspect before you buy

  • ✓Inspect panel gaps and paint condition
  • ✓Listen for wind noise on a motorway test drive
  • ✓Check for signs of windshield reinstallation

Buying Tips for the 2021 Ford Mustang Mach-E

  • ✓Ask the seller if the High Voltage Battery contactors (HVBJB) recall/fix has been performed; this is critical
  • ✓Test the SYNC 4A massive central touchscreen for lag or unresponsiveness
  • ✓Check the electronic door push-buttons; they can freeze in cold weather or fail entirely
2024 Ford Mustang Mach-E

Browse 2021–2023 Ford Mustang Mach-E in our Directory

View MOT history, registration data, and reliability scores for 2021–2023 Ford Mustang Mach-E vehicles.

View 2021–2023 Directory

Other Ford Mustang Mach-E Year Periods

2021–202320242025

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