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
2021–2025 Hyundai Ioniq 5 · common problems & known faults
A well-engineered and fast-charging electric crossover, where software updates and minor trim issues are the main things used buyers should check.
Compiled & reviewed by the VehicleFaults Research Team · last reviewed August 2026
Quick answer
The most commonly reported faults on the 2021–2025 Hyundai Ioniq 5 are Integrated Charging Control Unit (ICCU) failure preventing AC charging or displaying a 'Check EV System' warning, Infotainment and instrument cluster software glitches requiring updates and 12V battery drain issues on early production cars. 1 of the documented issues are rated high severity · inspect these first. Full inspection points, onset mileage and what to check are listed below.
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Build the inspection planReliability snapshot
Based on the documented faults on this page for the Hyundai Ioniq 5.
5.7/ 10
- Critical
- 0
- High
- 1
- Medium
- 5
- Low
- 2
Guidance only · reflects reported patterns, not a specific car's condition.
Hyundai Ioniq 5 problems by year
Which faults an average example has usually reached depends on its age. Pick a model year for the faults that matter on that build.
Known faults to check
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
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Build the inspection planInteriorLow
Dashboard and door trim rattles on rough roads
- Typically appears
- Age-related
- What to inspect
- Drive over rough surfaces and listen for interior rattles
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
BodyworkLow
Panoramic sunroof wind noise and seal issues
- Typically appears
- Age-related
- What to inspect
- Check for wind noise around the sunroof at motorway speed if fitted
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.
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.
BodyworkMedium
Flush exterior door handles fail to present automatically when the vehicle is unlocked.
- Typically appears
- 30,000-60,000 miles
- What to inspect
- Lock the car, wait 10 seconds, and unlock it using the key fob. Confirm that all four electronic door handles pop out simultaneously and retract fully when locked.
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Build my inspection planFrequently asked questions
Is the Ioniq 5 reliable?
Yes, it has a strong reliability record, with most issues being minor software glitches.
Should I check the 12V battery?
Yes, early cars had some 12V drain issues, so checking its health is a sensible precaution.
Is battery degradation a concern?
Battery health is generally strong under the manufacturer warranty, but a health check report is still worthwhile.
Are there any structural concerns?
None significant, though checking for panoramic sunroof wind noise is worthwhile if fitted.
What are the servicing requirements for the high-voltage battery coolant?
The Ioniq 5 uses a specialised low-conductivity coolant for the high-voltage battery system. This must be replaced every 40,000 miles or 3 years, whichever comes first. It is a costly service procedure requiring diagnostic tools to bleed the system, so check the service history to ensure this has been completed on schedule.
Does the Ioniq 5 suffer from accelerated or uneven tyre wear?
Yes, due to the vehicle's kerb weight of over two tonnes and instant electric torque, rear tyre wear can be rapid, particularly on dual-motor AWD variants. Inspect the inner edges of the rear tyres carefully, as factory camber settings can cause the inner shoulders to scrub out significantly faster than the outer tread.
Sources & further reading
Faults are compiled from documented recalls, technical bulletins, owner reports and mechanic sources, then reviewed for accuracy. This is guidance only · not a substitute for a professional inspection.
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