NHTSA Complaint #11718502 — 2022 HYUNDAI IONIQ 5

I have had multiple issues believed to be related to the ICCU. The first issue was that my 12V battery deteriorated and died prematurely. I had to purchase a jump start charger and ultimately replace the OEM 12V battery in 2024 (within the first 2 years of owning my new vehicle) because it was failing to reliably start and I was at risk of being stranded every time I parked and turned off my vehicle. The 2nd issue occurred in Dec 2025 - the vehicle stopped charging with L1/L2 chargers. The dealer did not have availability to diagnose for 3+ weeks (until Jan'26), during which my only option was to use L3 Fast DC chargers (severely limiting my options for when/where I charge and costing a premium price). Once the dealer inspected my vehicle, they confirmed it was the ICCU and informed me there is a nationwide shortage and that it would be 6-8 weeks before a replacement was available. I'm currently at week 4 (mid-Feb) with no ETA currently available, so I'm forced to drive a replacement vehicle (and make alternative arrangements for personal travel that would violate replacement vehicle terms & conditions).