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An Integrated Charging Control Unit (ICCU) failure halts the vehicleâs ability to charge and power the 12-volt battery. When it fails, the car can no longer keep the 12V battery charged. This drains the 12V system, potentially causing a sudden loss of motive power while driving or a "bricked" car that won't start. The presents a safety problem because it happened while I was driving and the car slowed down to a halt in a high speed traffic area. This is a well known issue  with Hyundais and Kias that share the same EV platform. The car was towed to the dealer on 7/21/2026 and was confirmed as an ICCU issue after diagnostics.

HYUNDAI IONIQ 9 2026 ELECTRICAL SYSTEM

ICCU failure.  Warning lights came on in the dash and diagnostic codes were available in my Hyundai app. My family and I had just gotten back from a road trip and if the ICCU would have failed while we were on the trip we would have been stranded and it would have been during the heat wave. The vehicle is currently in the service department waiting for the part to come in.

My 2026 Hyundai Ioniq 9 (Performance Calligraphy AWD), leased new in late April 2026 from Team Hyundai of Bend, OR, suffered an Integrated Charging Control Unit (ICCU) failure at approximately 1500 miles in late June 2026, roughly two months into ownership.  The failure progressed over several days. First, at a ChargePoint Level 2 (AC) station, the vehicle repeatedly displayed "charging started" every few minutes in a continuous start/stop/retry loop. Within days, AC charging failed completely: the vehicle reported "charging unsuccessful" on two separate EVSEs (a hardwired Level 2 charger and the Hyundai portable charger) across two different circuits. DC fast charging still worked. No other dashboard warnings were displayed. The dealer diagnosed a failed ICCU and replaced the unit. The vehicle was out of service for approximately 2 days thanks to the dealership's great service team. Luckily we were not out on a road trip which we have planned in the next 2 weeks which would have left us stranded with a newborn.   This is a documented, ongoing safety defect across Hyundai, Kia, and Genesis E-GMP vehicles. ICCU failure can cause the 12-volt battery to stop charging, leading to reduced power or sudden loss of motive power while driving, which creates a crash risk. NHTSA previously opened an Office of Defects Investigation into this issue, and Hyundai issued recalls 24V204 and 24V868 to address it.  What makes this report significant: the 2026 Ioniq 9 uses the second-generation ICCU that Hyundai represents as containing the corrective hardware changes. My failure occurred on this redesigned part, on a vehicle barely two months old, which indicates the underlying defect has not been resolved in current-production vehicles. This is the family's primary vehicle and we have a newborn at home, so the loss of use was a significant hardship.  I am filing so this second-generation ICCU failure is on the record and counts toward any future investigation or recall action.

HYUNDAI IONIQ 9 2026 POWER TRAIN

I was driving at 35 mph speed on a straight road and the car automatically activated emergency steering and pushed towards right I had to jerk the steering towards left to prevent any accidents. No adverse event occurred however this was unnerving experience.

HYUNDAI IONIQ 9 2026 FORWARD COLLISION AVOIDANCE: WARNINGS

The motorized flush door handles lack an automatic anti-pinch resistance sensor when retracting. If an object, hand, or childâs finger is caught inside the door handle while the vehicle locks, the motor continues to force the handle shut. This creates a severe crushing and entrapment hazard. This is available for inspection upon request.  My childâs finger got caught in the door handle while the vehicle was locking. There have also been several near miss incidents.  The problem has been reported to my local dealership where I purchased the vehicle, but they do not appear to take the issue seriously.  The issue has not been inspected by the manufacturer, police, insurance representatives, or others.  There are no warning lights or messages due to this issue.

2026 Hyundai Ioniq 9 RWD — vehicle data sourced from FuelEconomy.gov.

La Hyundai Ioniq 9 RWD (2026) è un SUV elettrico da 5 porte che offre un'eccellente efficienza con un consumo combinato di 92 MPG. Con un'autonomia di 335 miglia, è una scelta sicura e pratica per chi cerca un veicolo elettrico affidabile.

Hyundai Ioniq 9 RWD (2026) product.specifications