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MG eléctrico (MG4, ZS EV, Marvel R) vs Volvo EX30: which engine is more reliable?

According to our risk index, the Volvo EX30 carries less risk than the MG eléctrico (MG4, ZS EV, Marvel R): 14/100 versus 20/100 (both low risk). The MG eléctrico (MG4, ZS EV, Marvel R) has 1 documented serious fault, the main one being «High-voltage system fault warning and loss of propulsion»; the Volvo EX30 has 1 documented serious fault, the main one being «NMC battery cells that may overheat under high charge in the EX30».

Risk index

MG eléctrico (MG4, ZS EV, Marvel R)

20

Low risk · 1 serious fault

Risk index

Volvo EX30

14

Low risk · 1 serious fault

Lower risk

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

15 sourcesHow we work

Is the MG eléctrico (MG4, ZS EV, Marvel R) reliable?

MG electric cars have few documented battery or motor faults; the most cited is AC charging, which is sometimes rejected or interrupted. What Car? places the MG4 in the lower part of its survey, mainly for minor electronics.[1][2][3]

See the 2 of the MG eléctrico (MG4, ZS EV, Marvel R) faults

Is the Volvo EX30 reliable?

It has no track record yet: the only documented fault in the drivetrain is the 2026 recall over NMC battery cells, which according to Volvo does not affect units in the EU. There is no data on the motor or the gearbox.[4][5]

See the of the Volvo EX30 fault

Side-by-side comparison

Comparison of MG eléctrico (MG4, ZS EV, Marvel R) and Volvo EX30
MG eléctrico (MG4, ZS EV, Marvel R)Volvo EX30
Technical data
TypeEngineEngine
FuelElectricalElectrical
Displacement——
Timing——
Power143–435 hp150–428 hp
Productionsince 2019[6][7][8][9]since 2024[10][11]
Reliability
Risk index (what is it?)20Low risk14Low risk
Documented faults21
Of high or critical severity11
Worst severityHigh severityCritical severity
Main faults
  1. Medium severity: Charging faults: on-board charger and interrupted charging
  2. High severity: High-voltage system fault warning and loss of propulsion
  1. Critical severity: NMC battery cells that may overheat under high charge in the EX30
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versions
  • ZS EV Long Range 72.6 kWh, 177 hp (2021-2024)[12]
  • Single Motor 51 kWh LFP, 150-272 hp (2024-present)[5][13]
With cautionVersions to be cautious about
  • MG4 Standard Range 51 kWh LFP, 170 hp (2022-present)[2]
  • MG4 Long Range 64 kWh, 204 hp (2022-present)[1]
  • MG4 Extended Range 77 kWh, 245 hp (2023-present)[1][2]
  • MG4 XPower 64 kWh, 435 hp (2023-present)[14]
  • ZS EV 44.5 kWh, 143 hp (2019-2021)[15]
  • ZS EV Standard Range 51 kWh LFP, 150 hp (2022-2024)[12]
  • Marvel R Comfort/Luxury 70 kWh, 180 hp (2021-2024)[3]
  • Marvel R Performance 70 kWh, 288 hp (2021-2024)[3]
  • Single Motor Extended Range and Twin Motor Performance, 69 kWh NMC, 272-428 hp (2024-present)[4][5][10]
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

MG eléctrico (MG4, ZS EV, Marvel R)

Volvo EX30

Other comparisons

With the MG eléctrico (MG4, ZS EV, Marvel R)

With the Volvo EX30

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. Fiabilité Mg MG4 (2023): toutes les pannes connuesFiches-auto.fr · Reliability study · consulted 30 October 2026 · in French
  2. Used MG4 2022-present reliabilityWhat Car? · Reliability study · consulted 30 October 2026
  3. Fiabilité Mg Marvel R (2021): toutes les pannes connuesFiches-auto.fr · Reliability study · consulted 30 October 2026 · in French
  4. Volvo llama a revisión a más de 40.000 EX30 en todo el mundo: riesgo de incendio en la bateríaAutofácil · Motoring press · published 25 February 2026 · consulted 30 October 2026 · in Spanish
  5. Batterieprobleme: Volvo ruft über 40.000 EX30 zurückElektroauto-News · Motoring press · published 24 February 2026 · consulted 30 October 2026 · in German
  6. MG4 EVWikipedia · Other source · consulted 30 October 2026
  7. MG ZS (crossover): sección MG EZS / ZS EVWikipedia · Other source · consulted 30 October 2026
  8. Datos generales MG MG4 Electric Luxury (05/23 - 07/25)ADAC · Technical documentation · consulted 30 October 2026 · in German
  9. MG Marvel R Electric: motores, equipamiento y preciosCarnovo · Technical documentation · published 21 July 2023 · consulted 30 October 2026 · in Spanish
  10. Fiabilité Volvo EX30 (2024): problèmes connus et rappelsFiches-auto.fr · Reliability study · consulted 30 October 2026 · in French
  11. Volvo EX30 (Wikipedia, inglés)Wikipedia · Other source · consulted 30 October 2026
  12. Fiabilité Mg ZS: toutes les pannes connuesFiches-auto.fr · Reliability study · consulted 30 October 2026 · in French
  13. Rückruf Volvo EX30: Maximal 70 Prozent laden, sonst Brandgefahr der BatterieAuto Motor und Sport · Motoring press · published 24 February 2026 · consulted 30 October 2026 · in German
  14. Foro GoingElectric: MG4 XPower con fallo del sistema de control y sin cargaGoingElectric · Owners' forum · consulted 30 October 2026 · in German
  15. Foro MGEVs: batería de tracción de un ZS EV de 2019 averiada con menos de 22.000 millasMGEVs.com · Owners' forum · published 26 August 2025 · consulted 30 October 2026