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Dacia Spring vs Ford Mustang Mach-E: which engine is more reliable?

According to our risk index, the Dacia Spring carries less risk than the Ford Mustang Mach-E: 29/100 versus 32/100 (both moderate risk). The Dacia Spring has 1 documented serious fault, the main one being «Serious traction battery alerts and their management (BMS)»; the Ford Mustang Mach-E has 1 documented serious fault, the main one being «High-voltage battery contactors overheating: loss of power».

Risk index

Dacia Spring

29

Moderate risk · 1 serious fault

Lower risk

Risk index

Ford Mustang Mach-E

32

Moderate risk · 1 serious fault

The index (0–100) weights the severity and frequency of the three most serious documented faults. How it is calculated

12 sourcesHow we work

Is the Dacia Spring reliable?

The Spring's drivetrain is simple, but Fiches-auto.fr records the charger and charging port as the category with the most testimonies (17 out of 73), and about nine serious alerts for the traction battery; the motor barely features. The sample is made up of voluntary reviews.[1]

See the 2 of the Dacia Spring faults

Is the Ford Mustang Mach-E reliable?

The Mach-E's electrical system has one documented weak point in Europe: the high-voltage battery contactors, which overheat and can cause a loss of power. Ford first fixed it with software (2022) and then by replacing the battery junction box (2023). No motor or battery faults have been published in Europe beyond that.[2][3][4]

See the of the Ford Mustang Mach-E fault

Side-by-side comparison

Comparison of Dacia Spring and Ford Mustang Mach-E
Dacia SpringFord Mustang Mach-E
Technical data
TypeEngineEngine
FuelElectricalElectrical
Displacement——
Timing——
Power45–65 hp268–487 hp
Productionsince 2021[5][6]since 2021[7][8][9]
Reliability
Risk index (what is it?)29Moderate risk32Moderate risk
Documented faults21
Of high or critical severity11
Worst severityHigh severityHigh severity
Main faults
  1. High severity: Serious traction battery alerts and their management (BMS)
  2. Medium severity: Faults in the on-board charger and charging port
  1. High severity: High-voltage battery contactors overheating: loss of power
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versionsNoneNone
With cautionVersions to be cautious about
  • Spring Electric 45, 45 hp (2021-2025)[1]
  • Spring Electric 65, 65 hp (2023-2025)[1]
  • Standard Range, 75.7 kWh battery, 269-329 hp (2021-2025)[2][3]
  • Extended Range, 98.8 kWh battery, 276-375 hp (2021-present)[10][11]
  • GT, 98.8 kWh battery, 487 hp (2021-present)[10][12]
AvoidVersions to avoidNoneNone

Severity of each fault: green, low; amber, medium; red, high; dark red, critical. How we rate them

Cars that each one is fitted to

Dacia Spring

Ford Mustang Mach-E

Other comparisons

With the Dacia Spring

With the Ford Mustang Mach-E

Compare other engines

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Sources

Every fact on this page links to its source. If you find an error, let us know.

  1. Tous les problèmes sur Dacia Spring 2021 (73 témoignages)Fiches-auto.fr · Reliability study · consulted 30 October 2026 · in French
  2. Rückruf Ford Mustang Mach-E: Hochvolt-Batterieauto motor und sport · Motoring press · consulted 30 October 2026 · in German
  3. Ford Mustang Mach-E: battery switch overheats after recall (KBA 013267)car-recalls.eu · Other source · published 19 December 2023 · consulted 30 October 2026
  4. Fiabilité Ford Mustang Mach-E: pannes et avisfiches-auto.fr · Motoring press · consulted 30 October 2026 · in French
  5. Dacia Spring (Wikipedia, alemán)Wikipedia · Other source · consulted 30 October 2026 · in German
  6. Dacia Spring (Wikipedia, español)Wikipedia · Other source · consulted 30 October 2026 · in Spanish
  7. Ford Mustang Mach-E 1. Generation: ModellvariantenADAC Autokatalog · Technical documentation · consulted 30 October 2026 · in German
  8. Ford Mustang Mach-E reviewDrive (antes Honest John) · Motoring press · consulted 30 October 2026
  9. Ford Mustang Mach-EWikipedia (inglés) · Other source · consulted 30 October 2026
  10. Ford Mustang Mach-E: Probleme mit dem HochvoltschützÖAMTC · Consumer association · published 28 December 2023 · consulted 30 October 2026 · in German
  11. Ford Mustang Mach-E: Rückruf wegen Leistungsverlustfuturezone.at · General press · published 20 October 2023 · consulted 30 October 2026 · in German
  12. Ford Mustang Mach-E: Rückruf wegen überhitzender Hochvoltbatterieecomento.de · Motoring press · published 24 June 2022 · consulted 30 October 2026 · in German