Hyundai Ioniq 5 Common Problems & Reliability
A retro-futrinsic EV on the E-GMP platform. Highly acclaimed, but early cars have been defined by ICCU (Integrated Charging Control Unit) hardware failures and 12V battery management bugs common to the platform.
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Detailed fault breakdown, symptoms, and estimated repair bills by production year.
Most Common Hyundai Ioniq 5 Faults & Repair Costs
ICCU Failure (Integrated Charging Control Unit)
The ICCU handles 12V charging from the high-voltage battery. Internal MOSFETs can fail due to overvoltage spikes, often blowing an internal 40A fuse and causing a total loss of 12V replenishment while driving.
"Check electric vehicle system" warning, Audible "pop" followed by "Stop vehicle and check power supply", 12V battery dies repeatedly, Turtle mode
- Service campaign status for ICCU (TSB 24-01-086H)
- Scan for DTC P1A9096 (DC-DC Converter Error)
12V Battery Logic & "Orange Light" Confusion
The amber dashboard light indicates 12V charging. Logic bugs in early software would stop 12V maintenance if the HV battery dropped below 20%, leading to "bricked" cars even if the HV battery had plenty of charge for systems.
12V battery flat despite HV battery being at 20-30%, Car fails to enter "Ready" mode
- Confirm BMS and VCU software are at the latest revisions
Steering Column Knock/Clunk
A known issue where a bearing in the steering column or a friction point in the roll connector causes a knock or clicking sound when turning.
Clunk felt through wheel at low speed, Clicking when rotating steering wheel
- Manoeuvre at low speed
- Check for TSB 22-ST-005H/008H compliance
Buying a used Hyundai Ioniq 5? Always check for hidden finance and write-off history.
Mechanical problems are only half the battle. Over 1 in 3 UK used cars checked have unpaid finance or accident write-off records that could cause you to lose the car or thousands in value.