ElectricalMedium
12V battery drain issues on early production cars
HV battery module work£1,200–£8,000
Inspect · Check the 12V battery health and ask about any history of failed starts
2021–2025 Hyundai Ioniq 5 · common fault repair costs
What the known faults on this Hyundai Ioniq 5 typically cost to put right at a UK independent garage · use the figures to price risk before you bid, and to justify a reduction when something shows up on inspection.
Cost at a glance
- Most expensive fault
- £1,200–£8,000
- Top three risks, from
- £1,700
- Worst case, everything
- £16,000
The single priciest documented job on the 2021–2025 Hyundai Ioniq 5 is hv battery module work at £1,200–£8,000. Few cars need every repair listed here · treat £2,630–£16,000 as the full exposure if one arrived with all of them.
Cost per fault
BodyworkLow
Panoramic sunroof wind noise and seal issues
Body & corrosion repair£250–£1,800
Inspect · Check for wind noise around the sunroof at motorway speed if fitted
BodyworkMedium
Flush exterior door handles fail to present automatically when the vehicle is unlocked.
Body & corrosion repair£250–£1,800
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.
ElectricalMedium
Infotainment and instrument cluster software glitches requiring updates
Infotainment repair or software fix£120–£1,200
Inspect · Check the car has the latest software update and test all screens for freezing
SuspensionMedium
Rear suspension knocking from worn bushes
Suspension refresh (per axle)£250–£1,100
Inspect · Check for knocking noises over speed bumps at the rear
High Voltage SystemHigh
Integrated Charging Control Unit (ICCU) failure preventing AC charging or displaying a 'Check EV System' warning.
EGR valve / cooler replacement£300–£900
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.
InteriorLow
Dashboard and door trim rattles on rough roads
Door / window mechanism£130–£600
Inspect · Drive over rough surfaces and listen for interior rattles
Exterior ElectricalMedium
Motorised charge port door mechanism fails to open, gets stuck, or makes grinding noises during operation.
Door / window mechanism£130–£600
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.
Ranges are indicative parts-and-labour costs at a UK independent garage, inclusive of VAT. Franchised dealers typically sit 40–80% higher, and prestige or electrified variants sit at the top of each band. Always get a written quote before committing.
Inspecting a Hyundai Ioniq 5 this week?
Build a tickable checklist for the exact car in front of you, record faults with photos, and hand the buyer a report.