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Audi e-tron / Q8 e-tron vs Hyundai-Kia E-GMP (Ioniq 5, Ioniq 6, EV6): which engine is more reliable?

According to our risk index, the Hyundai-Kia E-GMP (Ioniq 5, Ioniq 6, EV6) carries less risk than the Audi e-tron / Q8 e-tron: 40/100 versus 43/100 (both 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 Hyundai-Kia E-GMP (Ioniq 5, Ioniq 6, EV6) has 3 documented serious faults, the main one being «Faulty ICCU: 12 V battery drains, charging fails and power is lost».

Risk index

Audi e-tron / Q8 e-tron

43

Moderate risk · 2 serious faults

Risk index

Hyundai-Kia E-GMP (Ioniq 5, Ioniq 6, EV6)

40

Moderate risk · 3 serious faults

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 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 Hyundai-Kia E-GMP (Ioniq 5, Ioniq 6, EV6) reliable?

The E-GMP platform is reasonably reliable, with one clear caveat: the ICCU (on-board charger and 12 V converter) had campaigns on the Ioniq 5, Ioniq 6 and EV6 up to production in early 2024. Beyond that, the battery keeps high health in measurements and the motor has few documented cases.[4][5][6]

See the 4 of the Hyundai-Kia E-GMP (Ioniq 5, Ioniq 6, EV6) faults

Side-by-side comparison

Comparison of Audi e-tron / Q8 e-tron and Hyundai-Kia E-GMP (Ioniq 5, Ioniq 6, EV6)
Audi e-tron / Q8 e-tronHyundai-Kia E-GMP (Ioniq 5, Ioniq 6, EV6)
Technical data
TypeEngineEngine
FuelElectricalElectrical
Displacement——
Timing——
Power249–503 hp151–325 hp
Production2019–2025[7]since 2021[8][9][10]
Reliability
Risk index (what is it?)43Moderate risk40Moderate risk
Documented faults24
Of high or critical severity23
Worst severityCritical severityHigh severity
Main faults
  1. Critical severity: Battery cell modules with a risk of overheating and fire
  2. Critical severity: Moisture ingress at the battery connection on the early units (2019)
  1. High severity: Faulty ICCU: 12 V battery drains, charging fails and power is lost
  2. High severity: Faulty traction battery module or cells
  3. High severity: Whine from the reduction gear or electric motor and bearing wear
Most expensive documented repairNo reliable dataup to €5,000Faulty ICCU: 12 V battery drains, charging fails and power is lostPublished figure[4][11]
Which versions to buy
BuyRecommended versions
  • Q8 e-tron 50 / 55 and SQ8, 95 and 114 kWh gross batteries (2022-2025)[1][2][7]
  • Ioniq 5 and EV6 with 84 kWh battery, facelift (2024-present)[4][11]
With cautionVersions to be cautious about
  • e-tron 50 quattro, 71 kWh gross battery (2020-2022)[1][2][12]
  • e-tron 55 quattro and S, 95 kWh gross battery (2019-2022)[1][2][3]
  • Ioniq 5 and EV6 58 kWh, rear-wheel drive, 170 hp (2021-2024)[4][13]
  • Ioniq 5 and EV6 72.6 kWh and 77.4 kWh, rear-wheel drive, 218-229 hp (2021-2024)[4][6][14]
  • Ioniq 5, Ioniq 6 and EV6 77.4 kWh, all-wheel drive, 306-325 hp (2021-2024)[4][15]
  • Ioniq 6 53 kWh, rear-wheel drive, 151 hp (2023-present)[4][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

Audi e-tron / Q8 e-tron

Hyundai-Kia E-GMP (Ioniq 5, Ioniq 6, EV6)

Other comparisons

With the Audi e-tron / Q8 e-tron

With the Hyundai-Kia E-GMP (Ioniq 5, Ioniq 6, EV6)

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. 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
  2. Audi-Rückruf: Defekte Akkuzellen - Brandgefahr beim E-Tronauto motor und sport · Motoring press · published February 2024 · consulted 30 October 2026 · in German
  3. Schlechter Start: Audi muss verkaufte E-Trons in die Werkstatt rufenWinFuture · General press · published 11 June 2019 · consulted 30 October 2026 · in German
  4. Hyundai Ioniq 5, Ioniq 6: Probleme mit der integrierten Ladeeinheit (ICCU)ÖAMTC · Consumer association · published 30 August 2024 · consulted 30 October 2026 · in German
  5. Batteriegesundheit von E-Gebrauchtwagen schwankt starkelectrive.net · Motoring press · published 2 September 2026 · consulted 30 October 2026 · in German
  6. Tous les problèmes du Kia EV6 2021 (19 témoignages)fiches-auto.fr · Motoring press · consulted 30 October 2026 · in French
  7. Audi e-tron (2018) - WikipediaWikipedia · Other source · consulted 30 October 2026
  8. Hyundai Ioniq 5Wikipedia · Other source · consulted 30 October 2026
  9. Kia EV6Wikipedia · Other source · consulted 30 October 2026
  10. Hyundai Ioniq 6Wikipedia · Other source · consulted 30 October 2026
  11. Hyundai & Kia: ICCU-Kollaps stoppt 67.000 Elektroautosschmidtisblog.de · General press · published 23 October 2026 · consulted 30 October 2026 · in German
  12. 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
  13. Hyundai Ioniq 5: Probleme, Schwachstellen und RückrufeGebrauchtwagenberater.de · Motoring press · consulted 30 October 2026 · in German
  14. Tous les problèmes sur Hyundai Ioniq 5 2021 (47 témoignages)fiches-auto.fr · Motoring press · consulted 30 October 2026 · in French
  15. Hyundai Ioniq 6: problèmes et fiabilité (7 témoignages)fiches-auto.fr · Motoring press · consulted 30 October 2026 · in French