2023 HYUNDAI IONIQ 5 Complaints

The ICCU of my vehicle failed and couldn't charge using AC power which also caused my 12V battery to fail. The car has had the old recall completed month prior to this failure so Hyundai didn't replace the defective part just updated software in hope the defect wouldnt happened. Regardless the defect happened and the car while still under warranty has not been fixed in 57 days. Hyundai states my vin has no ETA for part to be delivered and fixed.

During level 2 AC charging the circuit breaker in the house tripped. Tried again on a level 1 charger that came with the car and again it tripped the home circuit. Again, the car overloaded the house electricla system to a point it tripped the circuit breaker. Car taken to dealership for repairs. Dealership trouble shooting identifed failed ICCU with burnt connecter pins. HyundaiCase Management number 42152269 THIS IS A FIRE HAZARD FOR THE CAR AND HOUSE.

The component that failed was the Integrated Charging Control Unit (ICCU). This component has failed twice within the past ten months. The failed components are not available for inspection, as they were replaced during prior service repairs. The failure created a significant safety risk because it resulted in a sudden loss of normal vehicle function without advance warning during operation. This placed both myself and others on the road at risk, as the vehicle could become disabled unexpectedly while being driven. The issue has been inspected and confirmed by dealer-authorized mechanics following each occurrence. There were no earlier symptoms prior to the moment of failure. Warning messages related to the vehicle’s electrical system appeared only at the time the malfunction occurred. At the time of each incident, the failure occurred without advance warning during operation. Failures of the ICCU are believed to occur due to electrical overcurrent and thermal stress damaging internal power components during high-voltage to low-voltage conversion. When these internal components fail, the system may no longer maintain the 12V electrical supply, which can lead to loss of vehicle function or sudden loss of motive power during operation. Software updates have been issued to address the issue, but failures have continued to occur.

First time this occured we were driving in the winter and the car randomly shut down and started saying "Electrical Fault" or something of the sort. Turns out it was an ICCU issue. We got this replaced last year. Turn around 6 months later and the same thing happened again, but in an intersection. From my understanding when the ICCU fails the entire car basically goes into limp mode and prevents you from driving. Super dangerous and very hard to trust moving forward. Both of these issues have been confirmed by the dealership.

My car has suffered two ICCU failures despite going through all of the Hyundai recalls. Through the so far 30 months of my lease, the car has been non-operational for close to 5 months. The car is still currently in the shop awaiting delivery of the replacement parts, but there is absolutely no ETA being provided. As I understand it, this is a common issue with this model and given that it is the second occurrence for me personally, it doesn't seem like Hyundai has a good grasp on how to deal with the issue and give consumers a functioning vehicle.

I was driving home from lunch with my wife. A "Check electrical system" alert came up, followed shortly by an urgent beeping with a "Stop vehicle and check power supply." We were able to pull into a parking lot. We called our insurance company for a tow, which showed up two hours later. They took it to the nearest Hyundai dealership. It took three days to diagnose the issue as an ICCU failure, which appears all too common with Ioniq 5s. There's a national backlog on the replacement part, so my car will likely be in the shop for a month to six weeks. A six-week old AGM battery also died. Hyundai wants me to pay to replace it.

My car reported an error "check electric vehicle system" and would not drive over 25 mph. I had it towed to the nearest Hyundai dealership. This was after the car repeatedly killed the 12 volt battery. This is a common issue known with the ICCU.

The vehicle lost its ability to charge via AC power sources (level 1 and level 2), and the "Check vehicle electrical system" warning appeared on the dash. When using an OBD scanner, DTC P1E01 was present. It was inspected by a dealer, who informed me that the ICCU is in need of replacement, despite this component having been already addressed by a previous recall. Unfortunately the replacement component is backordered and there is no ETA available on the fix. For the time being I am limited to level 3 DC fast charging, which is a major inconvenience but does not represent a safety risk to myself or others.

The ICCU failed. I heard a popping noise, an error “check electric vehicle system” appeared on the dash, and i lost propulsion. I had my car towed to the dealership, where they eventually confirmed the ICCU failure.

We had the Internal Charge Control Unit replaced due to a warranty recall a couple years ago and it failed again on Dec. 23, 2025. The car has been at the dealer ever since, waiting for a replacement ICCU. The car refuses to charge and the dealer has diagnosed the issue as a faulty ICCU. There were no warnings or problem indicators prior to failure. This is our only vehicle, so while there was no safety issue, there is definitely a convenience issue. We had to obtain a loaner.