BatteryHigh
Traction battery health variation, particularly on ex-private-hire cars
- Typically appears
- Any
- What to inspect
- Run a state-of-health check and review charging history
- Typical repair
- HV battery module work · £1,200–£8,000
Is the 2016–2022 Hyundai Ioniq reliable?
Scored from 8 documented faults · reviewed by the VehicleFaults Research Team
Quick answer
3.9/ 10
Buy with cautionOn our documented-fault scoring the Hyundai Ioniq rates 3.9 out of 10 · buy with caution. We hold 8 known faults for it and 3 are rated high severity, so the risk is real but contained. The weak points cluster around electrical, battery and transmission. 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 · Walk unless the history is spotless
What the score is built from
- Critical
- 0
- High
- 3
- Medium
- 5
- Low
- 0
Weak points cluster around electrical, battery, transmission, brakes.
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Build the inspection planThe faults that decide it
DrivetrainHigh
Whining or clicking noise during acceleration or regenerative braking on BEV models.
- Typically appears
- 30,000-50,000 miles
- What to inspect
- Drive at 20-30 mph, lift off the accelerator to engage regen, and listen for a distinct whine or clicking sound from the front reduction gear.
- Typical repair
- Significant repair · £400–£1,400
HVACHigh
PTC heater failure resulting in no warm air blowing into the cabin when in EV mode.
- Typically appears
- 40,000-70,000 miles
- What to inspect
- Turn on the ignition to Ready mode, set climate control to maximum heat, and check if warm air blows from the vents within 60 seconds.
- Typical repair
- Suspension refresh (per axle) · £250–£1,100
TransmissionMedium
Dual-clutch hesitation and judder on hybrid models
- Typically appears
- 70,000+ miles
- What to inspect
- Drive in slow traffic from cold
- Typical repair
- DCT clutch pack / mechatronic work · £900–£3,200
BrakesMedium
Rear disc corrosion from regenerative braking
- Typically appears
- Age-related
- What to inspect
- Inspect the rear discs carefully
- Typical repair
- Brakes (discs, pads, caliper) · £200–£800
Costs are indicative UK independent-garage bands for budgeting and negotiation · never a quote.
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