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Hyundai-Kia E-GMP (Ioniq 5, Ioniq 6, EV6) vs Stellantis e-CMP (e-208, Corsa-e, ë-C4…): which engine is more reliable?

According to our risk index, the Stellantis e-CMP (e-208, Corsa-e, ë-C4…) carries less risk than the Hyundai-Kia E-GMP (Ioniq 5, Ioniq 6, EV6): 36/100 versus 40/100 (both moderate risk). 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»; the Stellantis e-CMP (e-208, Corsa-e, ë-C4…) has 3 documented serious faults, the main one being «Loss of traction from a high-voltage system cut-out (‘electric traction fault’ warning)».

Risk index

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

40

Moderate risk · 3 serious faults

Risk index

Stellantis e-CMP (e-208, Corsa-e, ë-C4…)

36

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

19 sourcesHow we work

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.[1][2][3]

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

Is the Stellantis e-CMP (e-208, Corsa-e, ë-C4…) reliable?

Stellantis’s electric drivetrain has no serious factory faults documented: the battery holds up well (median 94% health at 50,000 km and 90.7% at 150,000 km in the e-208 and Corsa-e), and the problems cited are the charger and several software campaigns.[4][5][6]

See the 5 of the Stellantis e-CMP (e-208, Corsa-e, ë-C4…) faults

Side-by-side comparison

Comparison of Hyundai-Kia E-GMP (Ioniq 5, Ioniq 6, EV6) and Stellantis e-CMP (e-208, Corsa-e, ë-C4…)
Hyundai-Kia E-GMP (Ioniq 5, Ioniq 6, EV6)Stellantis e-CMP (e-208, Corsa-e, ë-C4…)
Technical data
TypeEngineEngine
FuelElectricalElectrical
Displacement——
Timing——
Power151–325 hp136–156 hp
Productionsince 2021[7][8][9]since 2019[10][11]
Reliability
Risk index (what is it?)40Moderate risk36Moderate risk
Documented faults45
Of high or critical severity33
Worst severityHigh severityCritical severity
Main faults
  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
  1. High severity: Loss of traction from a high-voltage system cut-out (‘electric traction fault’ warning)
  2. High severity: Traction battery control calibration: motor cut-out from faulty readings (2022)
  3. Critical severity: Astra Electric: communication fault between control units that can make the car move backwards (2023)
Most expensive documented repairup to €5,000Faulty ICCU: 12 V battery drains, charging fails and power is lostPublished figure[1][12]No reliable data
Which versions to buy
BuyRecommended versions
  • Ioniq 5 and EV6 with 84 kWh battery, facelift (2024-present)[1][12]
None
With cautionVersions to be cautious about
  • Ioniq 5 and EV6 58 kWh, rear-wheel drive, 170 hp (2021-2024)[1][13]
  • Ioniq 5 and EV6 72.6 kWh and 77.4 kWh, rear-wheel drive, 218-229 hp (2021-2024)[1][3][14]
  • Ioniq 5, Ioniq 6 and EV6 77.4 kWh, all-wheel drive, 306-325 hp (2021-2024)[1][15]
  • Ioniq 6 53 kWh, rear-wheel drive, 151 hp (2023-present)[1][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

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

Stellantis e-CMP (e-208, Corsa-e, ë-C4…)

See the 20 models with the Stellantis e-CMP (e-208, Corsa-e, ë-C4…)

Other comparisons

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

With the Stellantis e-CMP (e-208, Corsa-e, ë-C4…)

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. Hyundai Ioniq 5, Ioniq 6: Probleme mit der integrierten Ladeeinheit (ICCU)ÖAMTC · Consumer association · published 30 August 2024 · consulted 30 October 2026 · in German
  2. Batteriegesundheit von E-Gebrauchtwagen schwankt starkelectrive.net · Motoring press · published 2 September 2026 · consulted 30 October 2026 · in German
  3. Tous les problèmes du Kia EV6 2021 (19 témoignages)fiches-auto.fr · Motoring press · consulted 30 October 2026 · in French
  4. Ni un solo eléctrico baja del 86 % de batería: 500.000 tests miden la degradación de 20 modelos a los 150.000 kmtestcoches.es · Reliability study · published 4 September 2026 · consulted 30 October 2026 · in Spanish
  5. Peugeot e-208, e-2008, DS 3 e-Tense. Un rappel de 5 761 exemplairesL'argus · Motoring press · published 20 April 2022 · consulted 30 October 2026 · in French
  6. E-Fahrzeug-Rückruf: E-Motor könnte ausfallenauto motor und sport · Motoring press · published 1 March 2023 · consulted 30 October 2026 · in German
  7. Hyundai Ioniq 5Wikipedia · Other source · consulted 30 October 2026
  8. Kia EV6Wikipedia · Other source · consulted 30 October 2026
  9. Hyundai Ioniq 6Wikipedia · Other source · consulted 30 October 2026
  10. Common Modular Platform (CMP / e-CMP)Wikipedia · Other source · consulted 30 October 2026
  11. Peugeot Expert (electric versions)Wikipedia · Other source · consulted 30 October 2026
  12. Hyundai & Kia: ICCU-Kollaps stoppt 67.000 Elektroautosschmidtisblog.de · General press · published 23 October 2026 · 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
  16. E-Auto: Rückruf bei Opel, Peugeot, Citroën und DSGebrauchtwagenberater.de · Motoring press · published 8 June 2023 · consulted 30 October 2026 · in German
  17. Fiat 600 : fiabilité, pannes et rappels (600e)Fiches-auto.fr · Reliability study · consulted 30 October 2026 · in French
  18. Rückruf Opel Astra Electric: Kann in falsche Richtung fahrenauto motor und sport · Motoring press · published 23 November 2023 · consulted 30 October 2026 · in German
  19. Opel Astra (Astra Electric)Wikipedia · Other source · consulted 30 October 2026