Fiat 500e vs MG eléctrico (MG4, ZS EV, Marvel R): which engine is more reliable?

According to our risk index, the MG eléctrico (MG4, ZS EV, Marvel R) carries less risk than the Fiat 500e: 20/100 (low risk) versus 32/100 (moderate risk). The Fiat 500e has 1 documented serious fault, the main one being «Traction battery fire risk (2023 and 2024 recalls)»; 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».

Risk index

Fiat 500e

Moderate risk · 1 serious fault

Risk index

MG eléctrico (MG4, ZS EV, Marvel R)

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

Reviewed on 30 October 202614 sources How we work

Is the Fiat 500e reliable?

The 2020 500e's drivetrain has few declared faults in the motor, but its traction battery has been subject to two recalls over fire risk, and there are isolated complaints about AC charging. The available data is scarce: it is a recent model.^[1][2]

See the 2 of the Fiat 500e faults

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.^[3][4][5]

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

Side-by-side comparison

Comparison of Fiat 500e and MG eléctrico (MG4, ZS EV, Marvel R)
Item	Fiat 500e	MG eléctrico (MG4, ZS EV, Marvel R)
Technical data
Type	Engine	Engine
Fuel	Electrical	Electrical
Displacement	—	—
Timing	—	—
Power	95–118 hp	143–435 hp
Production	since 2020^[6][7]	since 2019^{[8][9][10][11]}
Reliability
Risk index (what is it?)	32Moderate risk	20Low risk
Documented faults	2	2
Of high or critical severity	1	1
Worst severity	Critical severity	High severity
Main faults	Critical severity: Traction battery fire risk (2023 and 2024 recalls) Medium severity: Refusals and interruptions of AC charging	Medium severity: Charging faults: on-board charger and interrupted charging High severity: High-voltage system fault warning and loss of propulsion
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	None	ZS EV Long Range 72.6 kWh, 177 hp (2021-2024)^[12]
With cautionVersions to be cautious about	500e Action 23.8 kWh, 95 hp (2020-)^[1] 500e 42 kWh, 118 hp (2020-)^[1]	MG4 Standard Range 51 kWh LFP, 170 hp (2022-present)^[4] MG4 Long Range 64 kWh, 204 hp (2022-present)^[3] MG4 Extended Range 77 kWh, 245 hp (2023-present)^[3][4] MG4 XPower 64 kWh, 435 hp (2023-present)^[13] ZS EV 44.5 kWh, 143 hp (2019-2021)^[14] ZS EV Standard Range 51 kWh LFP, 150 hp (2022-2024)^[12] Marvel R Comfort/Luxury 70 kWh, 180 hp (2021-2024)^[5] Marvel R Performance 70 kWh, 288 hp (2021-2024)^[5]
AvoidVersions to avoid	None	None

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

Cars that each one is fitted to

Fiat 500e

Fiat 500e

MG eléctrico (MG4, ZS EV, Marvel R)

Other comparisons

With the Fiat 500e

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

Compare other engines

First engine

Second engine

That is the comparison you are viewing: change one of the two engines.

Sources

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

Tous les problèmes sur Fiat 500e 2020 (23 témoignages)Fiches-auto.fr · Reliability study · consulted 30 October 2026 · in French
Fiat 500e: Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 30 October 2026 · in German
Fiabilité Mg MG4 (2023): toutes les pannes connuesFiches-auto.fr · Reliability study · consulted 30 October 2026 · in French
Used MG4 2022-present reliabilityWhat Car? · Reliability study · consulted 30 October 2026
Fiabilité Mg Marvel R (2021): toutes les pannes connuesFiches-auto.fr · Reliability study · consulted 30 October 2026 · in French
Fiat 500e (Wikipedia, alemán)Wikipedia · Other source · consulted 30 October 2026 · in German
Fiat 500e (Wikipedia, español)Wikipedia · Other source · consulted 30 October 2026 · in Spanish
MG4 EVWikipedia · Other source · consulted 30 October 2026
MG ZS (crossover): sección MG EZS / ZS EVWikipedia · Other source · consulted 30 October 2026
Datos generales MG MG4 Electric Luxury (05/23 - 07/25)ADAC · Technical documentation · consulted 30 October 2026 · in German
MG Marvel R Electric: motores, equipamiento y preciosCarnovo · Technical documentation · published 21 July 2023 · consulted 30 October 2026 · in Spanish
Fiabilité Mg ZS: toutes les pannes connuesFiches-auto.fr · Reliability study · consulted 30 October 2026 · in French
Foro GoingElectric: MG4 XPower con fallo del sistema de control y sin cargaGoingElectric · Owners' forum · consulted 30 October 2026 · in German
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