ICCU failure preventing car from AC charging. In shop 25 days now but part not available and not given estimated repair time. Car was bought new and has 24,600 miles on it.

- Banning, CA, USA

Even after getting all recalls done my IONIQ5 had an ICCU failure. I feel that latest update which was supposed to fix ICCU issue actually accentuated it. With number of complaints on this car for ICCU failure there should class action law suit on Hyundai

- Westford, MA, USA

On Saturday, [XXX], at approximately [XXX], I drove my 2022 Hyundai Ioniq 5 north on [XXX]. The car was operating normally. I stopped at the red light at the corner of [XXX] and noticed a large red circle with a "Check electrical system" warning on the driver's display screen. When the traffic light turned green, I pressed the accelerator pedal, and the car did not move. I looked at the "Park, Neutral, Reverse, Drive" shifter. The "P" was lit up, indicating the car was in "Park." I attempted to switch to "Drive, " and the status indicator remained in "P." I then pushed the "EV START STOP" switch to see if I could cycle the vehicle off and then back on to clear the problem. The switch had no effect. [XXX] is a busy four-lane, undivided street near the University of Colorado at Boulder campus. I selected the hazard flashers and called 911 to alert the Boulder Police Department that I was in a car that was immobilized in the middle of the right-hand northbound lane. Cars had to swerve to avoid me. The Police Department dispatched a vehicle that arrived 10 minutes later, pulled up behind me, and put its flashing lights on to alert traffic. While waiting for the tow truck, I received another alert on the driver's display that informed me that the 12-volt battery was nearly completely discharged, and I had 10 minutes of power left. The warning counted the remaining minutes to 0, and the displays shut down. From the first warning message to the shutdown, I could not turn the car system off or shift the car out of the park. The tow company had to put dollies under the rear wheels of the Ioniq 5 and lift the front end off the ground to tow the vehicle, as all four wheels were locked. The car was towed to Crossroads Hyundai in Loveland, Colorado. It had just been serviced to address all the recall issues, including the ICCU software update. The car has approximately 16,000 miles on it. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Boulder, CO, USA

In Apr 2024 we had an issue with charging the vehicle at level 1 and level 2 took to dealer and they replaced the ICCU unit. A week later the car was DOA no lights nothing so we had to jump start it. We Took to dealer they did an update, week later DOA again. Took to dealer and found out the MSU part needs to be replaced Back ordered for a month and still at dealer was given a loaner, sound familar cause its occuring over and over. Waiting on repair no ETA.

- Pottstown, PA, USA

Vehicle was having issues charging large battery. Would shut off immediately. Today 12v battery died, probably related to ICCU recall performed earlier this month.

- Spring Grove, PA, USA

It is UNKNOWN what component or system failed There was a sudden and total electrical failure with the inability to safely move the car. If this electrical failure had occurred on a turnpike or expressway it would have been a catastrophic event. Car was flat bedded to a dealership Dashboard warning provided less than 5 min time and 0.5 mile before ceasing to operate at all although car's computer thought that the car's health was OK.

- Merion Station, PA, USA

I started the car, and saw a "Check Electric Vehicle system" alert on the dashboard, and began driving. I was not far from my home, when I saw several messages saying "Stop Vehicle and Check Power Supply" - and the car began slowing and becoming unresponsive while I was in traffic. With my wife and infant son in the car, and being less than I mile from my home I was able to proceed cautiously and make it there. This is likely a known flaw in the integrated charge control unit of this model, which was subject to a voluntary service bulletin put out by Hyundai. I took care of the recommended service and firmware update in September 2023, but it did not prevent this electrical system failure - the service bulletin should have advised replacement instead of putting my family in danger without any warning.

- Chicago, IL, USA

ICCU failed and Fuse failed, causing car to go into turtle mode, barely made it hope to have it towed to dealer

- Austin, TX, USA

The vehicle lost traction power, failed to respond to presses to the accelerator and coasted to a stop. It gave no indication on the dash that there were any problems. Putting the car in park and then selecting drive again restored traction power and the car responded to pressing of the accelerator pedal. The car was not turned off and back on. During the incident: - The brakes, steering, air conditioning, radio and other electrical equipment continued to operate normally. - The car was configured for "Level 2" regen braking, but during the incident, when all pressure was removed from the accelerator pedal, the car did not "feel" like it slowed as normally did during Level 2 regen when there is no application of the accelerator. - The car was configured for "ECO" mode. The drive mode was switched to Normal and Sport during the incident but it had no effect. - The Power/Charge gauge on the dash neither indicated Power when the accelerator was pressed nor indicated Charge when coasting (as would be expected for Level 2 regen) or when the brake pedal was pressed. Car Information: - The car had about 75% charge and reported about ~260 miles of range. - The manufacturers app has not reported any "DTC" codes. - The car has no open recalls at this time. - Service Campaign 997 was completed August 23rd at dealer. - Service Campaign 9A1 was completed August 23rd at dealer. Additional Information: - A previous event similar to the above described event happened on August 21st where the vehicle lost traction power but gave no indication that anything was wrong. - Reported it to the dealer, but they were unable to find anything wrong or recreate the problem. - They applied the ICCU software update.

- Alexandria, VA, USA

The ICCU failed in the car. The car lost power while driving and showed an EV warning and the 12V battery warning.

- Scarsdale, NY, USA

While driving at highway speeds, there was a loud pop and the display showed "reduce power mode". We had to improvise a stopping place despite being far from home. There was no warning or issues beforehand. This incident was risky because of the loss of power while on a high speed thoroughfare and limited stopping options. The vehicle required a jump to move onto tow truck to take to dealership, where it has remained for two weeks without an estimate for repair. The symptoms.seem consistent with ICCU failure.

- La Crescenta-Montrose, CA, USA

While driving on the highway on 8/12 at around 4pm, with another passenger, doing approximately 65 MPH I received a "Check Electric Vehicle System" warning on my dashboard. The car showed no prior warnings, no other lights were on. MyHyundai app was also showing no diagnostic issues with the car. The car battery was showing a 77% charge at the time. I swerved on to the shoulder, putting myself in danger as this is a really busy highway. I checked the car and could not find anything wrong. Hyundai had not contacted me regarding any recalls. I decided to keep driving to see if I could make it home to diagnose the issue. I made it another 20 minutes and as I was about to exit the highway at around 60MPH the car completely slowed down to 20MPH suddenly, and I was forced to swerve onto the shoulder once again. The car would not accelerate past 20 MPH. Fearing an accident, I called a tow truck and had the car towed back to my house. There were no warnings lights/signs prior to this event. The car completely slowed down from 60-65MPH to 20MPH in the middle of the highway and I was forced to make an emergency stop putting myself and my passenger at risk. The car was brought to the dealership on 8/14 which is the first time I was alerted that there had been a recall on my car and that the ICCU would need replacement. At no point did Hyundai ever contact me via email, text, call, or mail alerting me there was a recall prior to this scary experience. This is gross negligence on the part of Hyundai, as my vehicle could have been rear ended and caused a major accident on the highway.

- Garwood, NJ, USA

When in motion, the -??EV Start Stop-??button is still allowed to turn off the vehicle if accidentally pressed. This happened to me while on the highway and moving about 15-20 MPH. The vehicle suddenly lose power and wouldn-??t accelerate. I could not move the vehicle, without hitting the EV Start Stop button several times.

- New York, NY, USA

Hyundai San Jose dealership, Customer Service, told me, The fuse surrounding the Lithium battery is broken. This causes the whole car break down, and it is very dangerous to drive. My car has been in this Hyundai dealership over 5 months now, Hyundai cannot send the parts to San Jose Hyundai and I cannot drive the car. Also the 12V small lead acid battery in the front, broken down a few times. Cannot start the car. The whole car shuts down.

- Ontario, CA, USA

While driving, on a busy street in Holyoke MA, a STOP waning appeared on the drivers display indicating an electrical/power problem. I pulled over to side of road and called a tow truck. Car was taken to dealer where they ran diagnostics on the vehicle. Diagnostics showed failed ICCU and bad cell in 12v battery. Replaced ICCU and high voltage fuse.

- South Hadley, MA, USA

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

- Tampa, FL, 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

Started vehicle and heard a loud pop with immediate amber warning to check electrical system with 12 volt battery and EV electrical system warning lights illuminated. While driving to dealerships, vehicle slowed abruptly at Highway speed and warning message said to stop vehicle immediately. Towed to dealership with probable bad integrated charging control unit and high voltage fuse blown. Seems to be an issue with many ioniq 5s. Recall this vehicle!

- Rohnert Park, CA, USA

Electrical system not working. The vehicle does not charge. The 12Volt battery is completely dead and vehicle does not start. Before the vehicle gone offline - it was reporting Electrical System is not charging and dead immediately. I towed the vehicle to Route 1 South, South Brunswick, NJ Hyundai Dealership on May 19th, and still in repairs. The main battery pack was showing 90% charge. The vehicle reported problem in the middle of the driving and completely slowed down to below 25Miles before and came to grinding halt. Jumpstarting the vehicle did not help.

- Monroe Township, NJ, USA

On February 6, 2023 at approximately 9:50 a.m. I was driving my Hyundai Ioniq 5 SEL northbound on CA Highway 135, Santa Maria, when I heard a loud pop coming from my car. Within a few seconds my car lost speed rapidly, from 55 mph to 25 then a second later 22 mph. I tried to accelerate - there was no response - the car maintained the 22 mph. A message appeared on the right side of the dash board in an orange circle -??check vehicle system-?? with a small upside down triangle with letters EV also inside this circle and a -??small orange battery-?? picture showed on the left. I drove the car onto the shoulder of the road and with my hazard lights blinking, drove a half block making a right hand turn onto Miller Street to get off the Highway. I entered CHC Medical Building-??s parking lot. Immediately upon entering the parking lot, my car stopped dead, before I had a chance to pull into a parking space. My car was now blocking cars coming in and out of the parking lot. I called Roadside Assistance and reported the above, the time was approximately 10:19 a.m. A tow truck (AAA) was requested by Roadside Assistance. After my conversation with Roadside Assistance, I turned the car on again and got power briefly - I moved the car into a stall space and waited. My car arrived at the Hyundai SLO dealership shortly before noon. The ICCU and fuse failed, and replacements have been ordered but the ETA is unknown Abrupt loss of speed was very unsafe

- Orcutt, CA, USA