What reliability score does the Hyundai Ioniq 5 get?

5.7 out of 10, scored from the 8 faults we document for this model and how severe each one is.

Is the 2021–2025 Hyundai Ioniq 5 reliable?

Scored from 8 documented faults · reviewed by the VehicleFaults Research Team

Quick answer

5.7/ 10

Mixed

On our documented-fault scoring the Hyundai Ioniq 5 rates 5.7 out of 10 · mixed. We hold 8 known faults for it and 1 are rated high severity, so the risk is real but contained. The weak points cluster around electrical, bodywork and interior. A well-serviced example with evidence for the big-ticket items is usually a safe buy; the score describes the model, not the specific car in front of you.

Verdict · Negotiate · budget for the known faults

What the score is built from

Critical: 0
High: 1
Medium: 5
Low: 2

Weak points cluster around electrical, bodywork, interior, suspension.

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The faults that decide it

High Voltage SystemHigh

Integrated Charging Control Unit (ICCU) failure preventing AC charging or displaying a 'Check EV System' warning.

Typically appears: 15,000-40,000 miles
What to inspect: Plug the vehicle into a forecourt AC wallbox. Ensure it initiates and sustains a charge for at least 60 seconds without dashboard error messages.
Typical repair: EGR valve / cooler replacement · £300–£900

ElectricalMedium

Infotainment and instrument cluster software glitches requiring updates

Typically appears: Age-related
What to inspect: Check the car has the latest software update and test all screens for freezing
Typical repair: Infotainment repair or software fix · £120–£1,200

ElectricalMedium

12V battery drain issues on early production cars

Typically appears: 20,000+ miles
What to inspect: Check the 12V battery health and ask about any history of failed starts
Typical repair: HV battery module work · £1,200–£8,000

SuspensionMedium

Rear suspension knocking from worn bushes

Typically appears: 40,000+ miles
What to inspect: Check for knocking noises over speed bumps at the rear
Typical repair: Suspension refresh (per axle) · £250–£1,100

Exterior ElectricalMedium

Motorised charge port door mechanism fails to open, gets stuck, or makes grinding noises during operation.

Typically appears: 20,000-50,000 miles
What to inspect: Press the charge port door button on the key fob and the physical button on the car. Verify it opens smoothly and closes completely flush.
Typical repair: Door / window mechanism · £130–£600

Costs are indicative UK independent-garage bands for budgeting and negotiation · never a quote.

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Quick answer

What the score is built from

The faults that decide it

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