1.We purchased the vehicle (Hyundai Ioniq 5, 2022 Model) on MAY 20, 2022. 2.The vehicle was acceptable until it started to fail on us while we were on the road, and soon after the vehicle crawled home at limited power and came to a stop, it would no longer even turn on. 3.Then started our nightmare with Hyundai USA. We called the service department and they told us, based on our brief description of what happened, that our vehicle would be unsafe to drive a single more mile (which was impossible anyhow because it wouldn-??t turn on), and to tow our vehicle to Hyundai dealership in Fayetteville, AR for repair on DECEMBER 27, 2022 at our own expense. 4. From what Hyundai, Fayetteville, AR's service engineer named Evan told us, they have replaced the fuse no less than four times and it kept blowing when they went to test the vehicle. After the basic fuse replacement, it caused the problem to become worse, and revealed an ICCU problem, that then revealed acceleration and charging problems, and the initial fuse problem still persisted. Codes kept popping up, and whenever they fixed the current issue, another one would present. Long story short, it turned out the vehicle was experiencing -??mass power surges, -?? issues with the batteries, and displaying codes for reasons they were unsure of, causing the basic fuse replacement to -??pop.-?? They even called in a Hyundai Engineer directly from corporate to try to fix the vehicle, but according to Evan, even he had no idea what was wrong with the vehicle and had left with some data.

- Bentonville, AR, USA

The vehicle completely lost power and there was 207 miles left to the charge. The message displayed on the driver's screen read "12V battery voltage low. Stop safely" I had no other choice than to stop since the car suddenly had zero power. The car was towed to Hyundai dealership on 2/15/23 and I have yet to have the vehicle repaired. Hyundai keeps informing me that the part is on order and delayed. I have been waiting a long time for a defective vehicle.

- Burlingame, CA, USA

Car literally DIED while driving. Went from normal speed to 12mph to 6mph to dead. ICCU failure.

- Tampa, FL, USA

Failed EV drive system. Error messages of electrical problems and shortly went complete dead. 12 volt battery was dead and won't charge. Car was towed to Ideal Hyundai in Fredrick MD. Dealer reported failed ICCU and parts for repair are on back order. Fortunately the failure occurred when pulling away from parking. If I had been at highway speed it could have been disastrous.

- Mckees Rocks, PA, USA

Called an ICCU failure. It's the control unit that charges the 12V battery from the high voltage battery. The unit fails blowing the high voltage fuse. Failure of this component causes the vehicle to all but shut down, even while driving. This is known by Hyundai. Others have said this happens at about 12 months and 10,000 miles. My car was 53/54weeks old and had 9,300 miles. This failure of this part may have also caused my AC to stop working. As pressure sensor on the 12V system that was working before the component failed was not working when I received the car back, resulting in another lengthy repair. I had about 0.7 miles warning, a yellow check EV system lit up, then the whole dash lit up saying to pull over immediately. The ICCU was replaced by Hyundai with the "2023 spec" version.

- Richmond, VA, USA

The power gave out on the car and Hyundai refuses to fix it. They said a part needs to ship over and they give very little updates.

- Chicago, IL, USA

The 12-volt battery that controls everything in the car stopped being recharged by the 800volt battery, eventually causing the car to suddenly lose power and slow to 22 mph on the freeway. I was able to pull over 3 lanes and exit what was fortunately an uncrowded freeway. The car would not exceed 22 mph and soon stopped altogether and could not be moved. The main 800volt battery was at 56% charge, as the 12-volt battery went to 0%. The car was towed to the dealer. After inspection the dealer has confirmed that the ICCU system has failed and must be replaced, with a long back order and still no delivery date after 5 weeks. There were warning messages that appeared before the vehicle lost power, saying to check the battery electrical system. There should have been a warning that said -??stop driving immediately as the electrical system is failing, and the car may stop even though the main battery is still well charged.-??

- Palo Alto, CA, USA

This vehicle's brake lights do not come on when using regenerative braking. The regenerative braking can bring this car to a complete stop fairly quickly and the brake lights should come on. Several near misses of people almost rear-ending me, and a few got mad enough that I feared a road rage incident. This after only owning the car for 2 weeks.

- North Bend, WA, USA

While driving vehicle, car had sudden and rapid loss of power that resulted in significant decrease in speed. Vehicle was nearly in a rear-end Collision due to sudden drop in speed. The car is currently being inspected by the Hyundai dealership with reported failure of the ICCU.

- Lincoln, CA, USA

Likely ICCU failure incapacitated vehicle while in motion on highway. Vehicle decelerated uncontrollably and would not re-accelerate. Shortly thereafter 12v battery warning appeared and vehicle was no longer operable. Series of warning lights. -??check electric vehicle system-?? upon car starting, -??Stop vehicle and check power supply-?? shortly after starting drive, "12v battery very low" immediately before vehicle went completely dead.

- Charleston, IL, USA

While driving to work on a 55 MPH road (single lane in each direction) my car faulted with warnings for me to pull over immediately and check my batteries. At the same time, the car's speed dropped quickly to a maximum of 24 MPH, which nearly caused the cars behind me to collide. After pulling over, I was able to limp into a safe area and call a tow truck. The service shop informed me that my Integrated Charge Control Unit and fuse needed to be replaced. I am still waiting for the part to come in (estimated delivery of two months). This issue is not isolated to me; others in social media groups have experienced similar issues with their MY 2022 Ioniq 5. Hyundai is quiet on how widespread the issue is, but given that there is a safety concern when one's auto suddenly slows down while on a highway, I thought it worth reporting.

- Mechanicsville, VA, USA

Started car. Heard a pop. -??Check electric vehicle system-?? appeared on the screen. Hyundai arranged for the car to be towed to the dealer. This is likely the ICCU+Fuse failure that seems to be happening to many owners of the Ioniq 5.

- Carlsbad, CA, USA

On 4/24/23, without an prior warning vehicle suddenly became undrivable. Received message: "Stop vehicle and check power supply". Car could lim along < 25mph for short distances. This condition along with indifferent Hyundai roadside assist left me stranded out of state for 5 hours before telling me to find my own way to tow the car. Car is at dealership with a diagnosed ICCU/ICCU fuse issue. To date I am being told that the parts are on back order for 2-3 weeks. Based upon online posts by others with this issue, this is not a realistic expectation. To date, Hyundai has yet to offer substitute transporation, relief from monthly paments, and reimbursement of all expenses incurred as a result of the loss of this vehicle.

- Pine Brook, NJ, USA

We've owned the car since new, just over one year. The car was performing well one day and my wife went to her evening work. When she returned to her car around 6pm, the car wouldn't respond to the key fob and the door wouldn't open. She was able to open it with a key, but the car wouldn't start. It's a fully electric car and NOTHING lit up or made a sound. The traction battery had ample charge, but she called Hyundai and the car needed a "jump" from a repair vehicle that was called out, much like an ICE car needs the occasional jump...we assumed an interior light was left on, but the car's app didn't inform either of us of any issue prior to this...the same exact scenario repeated itself about one week later and we had the car jumped again and brought to our dealer, Burns Hyundai in Marlton, NJ. They determined that "nothing was wrong" which made no sense to me. My wife picked up the car and approximately one week later, the exact same thing happened again. This time we dropped the car off at the dealer where it's been for nearly one month. With their customer service lacking and information not forthcoming, I had to go to the dealer myself to get some answers. It seems the computer was telling then some codes were coming through about the battery, but nothing more. It didn't need replacing and they couldn't replicate the problem over a period of weeks...There are MANY online reports of this car having 12V battery and ICCU issues. Our dealer has several Ioniq5s awaiting ICCU replacement for the same problem as my car, but they "can't get the part from Hyundai". While our car at times won't start, they aren't seeing that in their shop now, awaiting repairs on cars that apparently die when driving also with 12v battery problems. Our car is a lemon and we intend to retain counsel to assist us in its repair. https://www.theautopian.com/why-everyones-favorite-electric-car-keeps-stranding-its-owners/?fbclid=IwAR3yNgwVKtaGhGPd7HBz79tOV-UI1myLdmyrwDzcOJZfLarsG80b_6NJLpk

- Cherry Hill, NJ, USA

The car was driving fine, and an error popped up indicating to pull over and check battery. As I am going to pull over a red flashing indicator pops up saying -??pull over and check battery-??. As I start to pull over the car speed drops to 25 miles per hour and fully dies as I make it to the side of the road.

- Whittier, CA, USA

After a few minutes of driving, the vehicle presented a warning "Check Electric Vehicle System" and then got really slow. We were able to limp back home, where it is now parked. Hyundai has not had availability to diagnose the issue.

- Tacoma, WA, USA

Was in the middle of driving when a loud alert sounded and the dashboard showed the error "Stop vehicle and check power supply". The car otherwise behaved normally. I pulled into a parking log, looked at the only thing I knew how to look at (12v battery), confirmed it was still plugged in, and turned the car back on. The error was still there, but now the car wouldn't go over 26mph. I limped home, called a tow truck to take it to the nearest Hyundai that services electric vehicles, and they told me they'd have to replace the ICCU, which is backordered.

- Dobbs Ferry, NY, USA

Heard a "pop" sound and the car shortly after said "Check EV system." A few minutes later the car beeped loudly said "Stop vehicle and check power supply." A ODB scanner reported a P1A9096 code. This issue makes the vehicle inoperable with little warning.

- University Park, MD, USA

I got the new update for my car from dealership, didn't know it effect ego mode, it's really lagging any power, need push accelerator all the way down to get any power, danger for left turn, please look into this thanks.

- Perris, CA, USA

When my IONIQ5 slowly starts and stops while the brake pedal engages or disengages, a noise, something like "click, " comes from the rear passenger wheel house. Then, the brakes feel somewhat slippery. I think this has something to do with a transition between the regen brake and the traditional brake. The noise comes up every time I drive. Sometimes, I feel very unsafe because I am worried that the brake system fails.

- Roseville, CA, USA