Audi e-tron / Q8 e-tron 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 Audi e-tron / Q8 e-tron: 20/100 (low risk) versus 43/100 (moderate risk). The Audi e-tron / Q8 e-tron has 2 documented serious faults, the main one being «Battery cell modules with a risk of overheating and fire»; 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

Audi e-tron / Q8 e-tron

Moderate risk · 2 serious faults

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 202615 sources How we work

Is the Audi e-tron / Q8 e-tron reliable?

We have found no documented faults with the electric motor or the power electronics; what is on record are two precautionary high-voltage battery recalls: moisture at the connection (first 2019 units) and cell modules with a risk of overheating (built 2018-2022). Check the chassis number and the battery's state of health.^[1][2][3]

See the 2 of the Audi e-tron / Q8 e-tron 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.^[4][5][6]

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

Side-by-side comparison

Comparison of Audi e-tron / Q8 e-tron and MG eléctrico (MG4, ZS EV, Marvel R)
Item	Audi e-tron / Q8 e-tron	MG eléctrico (MG4, ZS EV, Marvel R)
Technical data
Type	Engine	Engine
Fuel	Electrical	Electrical
Displacement	—	—
Timing	—	—
Power	249–503 hp	143–435 hp
Production	2019–2025^[7]	since 2019^{[8][9][10][11]}
Reliability
Risk index (what is it?)	43Moderate risk	20Low risk
Documented faults	2	2
Of high or critical severity	2	1
Worst severity	Critical severity	High severity
Main faults	Critical severity: Battery cell modules with a risk of overheating and fire Critical severity: Moisture ingress at the battery connection on the early units (2019)	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	Q8 e-tron 50 / 55 and SQ8, 95 and 114 kWh gross batteries (2022-2025)^[1][2][7]	ZS EV Long Range 72.6 kWh, 177 hp (2021-2024)^[12]
With cautionVersions to be cautious about	e-tron 50 quattro, 71 kWh gross battery (2020-2022)^[1][2][13] e-tron 55 quattro and S, 95 kWh gross battery (2019-2022)^[1][2][3]	MG4 Standard Range 51 kWh LFP, 170 hp (2022-present)^[5] MG4 Long Range 64 kWh, 204 hp (2022-present)^[4] MG4 Extended Range 77 kWh, 245 hp (2023-present)^[4][5] 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)^[6] Marvel R Performance 70 kWh, 288 hp (2021-2024)^[6]
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

Audi e-tron / Q8 e-tron

Audi e-tron

MG eléctrico (MG4, ZS EV, Marvel R)

Other comparisons

With the Audi e-tron / Q8 e-tron

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

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Sources

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

Audi e-tron (2018 - 2022): recall por sobrecarga térmica de la batería (alerta Safety Gate 8/2024)car-recalls.eu · Other source · published 26 February 2024 · consulted 30 October 2026
Audi-Rückruf: Defekte Akkuzellen - Brandgefahr beim E-Tronauto motor und sport · Motoring press · published February 2024 · consulted 30 October 2026 · in German
Schlechter Start: Audi muss verkaufte E-Trons in die Werkstatt rufenWinFuture · General press · published 11 June 2019 · 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
Audi e-tron (2018) - WikipediaWikipedia · Other source · consulted 30 October 2026
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
Gebrauchtwagen-Check Audi e-tron (GE): Günstiger als ein elektrischer Fiat Grande PandaAutoScout24 Magazin · Motoring press · published 14 March 2025 · consulted 30 October 2026 · in German
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