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Dacia Spring vs Mercedes EQA / EQB: which engine is more reliable?

According to our risk index, the Dacia Spring carries less risk than the Mercedes EQA / EQB: 29/100 versus 36/100 (both moderate risk). The Dacia Spring has 1 documented serious fault, the main one being «Serious traction battery alerts and their management (BMS)»; the Mercedes EQA / EQB has 2 documented serious faults, the main one being «Internal short circuit in the high-voltage battery: fire risk, software update and battery replacement».

Risk index

Dacia Spring

29

Moderate risk · 1 serious fault

Lower risk

Risk index

Mercedes EQA / EQB

36

Moderate risk · 2 serious faults

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

9 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 Mercedes EQA / EQB reliable?

The only well-documented faults in the EQA and EQB electric drivetrain are the battery recalls for fire risk (2025 and 2026, the latter with battery replacement) and a 2024 pyrofuse check. No recurring faults have been published.[2][3][4][5]

See the 2 of the Mercedes EQA / EQB faults

Side-by-side comparison

Comparison of Dacia Spring and Mercedes EQA / EQB
Dacia SpringMercedes EQA / EQB
Technical data
TypeEngineEngine
FuelElectricalElectrical
Displacement——
Timing——
Power45–65 hp190–292 hp
Productionsince 2021[6][7]since 2021[8]
Reliability
Risk index (what is it?)29Moderate risk36Moderate risk
Documented faults22
Of high or critical severity12
Worst severityHigh severityCritical 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. Critical severity: Internal short circuit in the high-voltage battery: fire risk, software update and battery replacement
  2. Critical severity: Displaced pyrofuse housing: possible pyrotechnic fuse failure and 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]
  • EQA 250, 300 4MATIC and 350 4MATIC, 69.7 kWh (2021-present)[2][3][4]
  • EQA 250+, 73.9 kWh, 190 hp (2022-present)[4][9]
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

Mercedes EQA / EQB

Other comparisons

With the Dacia Spring

With the Mercedes EQA / EQB

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. Recall: Mercedes-Benz EQA (2021 - 2024) EV/Hybrid, fire (2025)car-recalls.eu · Other source · published 5 April 2025 · consulted 30 October 2026
  3. Recall: Mercedes-Benz EQA (2021 - 2024) EV/Hybrid, fire (2026)car-recalls.eu · Other source · published 8 March 2026 · consulted 30 October 2026
  4. Segunda llamada a revisión de los Mercedes EQA y EQB por riesgo de incendio. Toca cambiar la bateríaAutofácil · Motoring press · published 15 April 2026 · consulted 30 October 2026 · in Spanish
  5. Recall: Mercedes-Benz EQA (2024) electronic, injury (pirofusible)car-recalls.eu · Other source · published 25 October 2024 · consulted 30 October 2026
  6. Dacia Spring (Wikipedia, alemán)Wikipedia · Other source · consulted 30 October 2026 · in German
  7. Dacia Spring (Wikipedia, español)Wikipedia · Other source · consulted 30 October 2026 · in Spanish
  8. Mercedes-Benz EQAWikipedia · Other source · consulted 30 October 2026
  9. Es probable que Mercedes sustituya las baterías de los modelos EQA y EQB en Alemaniaelectrive · Motoring press · published 17 February 2026 · consulted 30 October 2026 · in Spanish