During normal driving with car charged to 95%, I heard a pop coming from the rear of the vehicle and saw an immediate warning about electrical system malfunction. I drove the car for less than a quarter mile and pulled over. I then received instruction on the dash to power off the car which I did. The car was towed to the dealership who diagnosed an ICCU failure. It had been to the dealer twice for safety recall notices related to the same issue. This is a known problem with this type of vehicle. Awaiting replacement parts. This problem will cause complete loss of power to the vehicle. Fortunately I was able to pull over and park in a safe space before this happened. Obviously complete loss of power is a potential safety issue, thankfully systems alerted me to the problem. I have no idea if the replacement part will be of the same lot that failed in the first place.

- Piedmont, CA, USA

Our all-electric AWD Hyundai Ioniq 5 has an issue where the rear motor electric oil pump (EOP) overheats and ceases to function when the problem occurs, which disables the rear motor and effectively causes the car to become a front-wheel drive vehicle with a "hesitation" in the acceleration. This problem only occurs after a long time of high-speed driving and typically on a warm day (upwards of 70-80 degrees F). When the problem occurs, the rear motor ceases to function at all and only the front motor operates to power the vehicle forward. The acceleration is also impacted, such that when the accelerator is pushed, the car "hesitates" for 1-3 seconds before the front motor takes over the demand for power and "lurches" the car forward in a jerky motion. The symptom will last as long as the car is in an overheated state. However, if you pull the car over and let it rest for a period of time (undetermined), the rear motor will again operate normally until it overheats again. For us, this occurred once on a very hot day traveling approximately 50-60 miles on interstate travelling at speeds over 70 MPH. On another occurrence, it happened after driving the car about 200 miles (stopping for a lunch break in the middle), for about 4 hours. When this problem occurs in other cars equipped with RWD only, they lose all forward power in the car and coast to a stop even when the battery still has a charge. We've taken it to our local dealership for repair on Sept 12, 2024 (McGee Hyundai of Barre, VT) and they claim that there is nothing wrong with the vehicle. After researching the topic, I've determined it is the failing rear EOP must be replaced [XXX] and [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Orange, VT, USA

Battery will not stay charged, Car has to be jumped every time it's driven. Also sometimes the car turns off when it put in gear with a 12volt warning.

- Odenton, MD, USA

The recall stated in this report says that it was incomplete, however the recall was completed by the Hyundai Dealership, the software updates were installed and the ICCU failed anyway. When the unit failed the car went into "Turtle Mode", only able to go a max of 25 mph, and the 12 volt battery drained and died.

- Stockbridge, GA, USA

See attached document for complaint.

- Portland, OR, USA

12 volt battery dies after 2 years. Car is not starting and could stop working if it dies while being driven. The dealer replaced it But does not know why it died. I called the manufacturer but they were no help either.

- Waban, MA, USA

Received a code: DTC P1AA600 And did some research and was made aware that the EV battery needs to be exchanged out for a new one.

- Sauk Village, IL, USA

Charging port burned during DC fast charging session, resulting in melted charging pin. Unable to insert CCS connecter due to melted pin obstructing insertion. Further damage to electrical systems unknown. No warning signs shown aside from vehicle charging session ending. Lack of safety systems to prevent melting/burning of charging pins leaves potential for general vehicle fire, battery fire, etc. Dealer has had car in possession for over 10 days with no update. Corporate contact has been unresponsive.

- Newton, MA, USA

I have had my 2023 Ioniq 5 for 13-months. I have had two safety recall services performed - I understand those were ICCU software related. On [XXX] my car sounded a sudden alarm and a warning appeared saying to "STOP and Check Power Supply." I was not able to immediately pull over but found the ability to pull over within about 1/4 mile, the vehicle seemed to be losing power. It was frightening as there were many pedestrians and cyclists and I had no idea what was happening. The car was towed through AAA - we had difficulty getting it onto the truck as there was very little power and almost no power steering. The vehicle is now at the Rowe Hyundai dealership in Westbrook, ME. I was told the ICCU would need to be replaced as well as some kind of fuse. I am not sure I will feel safe driving this vehicle even after it is repaired. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Lincoln, MA, USA

[XXX] - Took Hyundai IONIQ 5 to All Star Hyundai Pittsburg for servicing and recall issue. [XXX]: Saw an error reading CHECK ELECTRIC VEHICLE SYSTEM! on the IONIQ 5, after which a BlueLink rep was connected and stated I needed to take the car to a dealership ASAP. No appt available until July so advised to take car back to All Star. Called All Star and spoke to Josh who said there were no appts until [XXX]. Arrived All Star 9:15. I stayed until 3:15 with a lot of back and forth on diagnostics, warranty, how long for repair etc. Called Hyundai Customer Care and spoke Stephen who said the car was purchased less than a year and it would be under warranty for repair. I spoke to David, Manager All Star, who said he does not know when the diagnostics will be complete/ when car would be ready. Told me to go to Enterprise and get a rental at my own expense. Went to Enterprise Pittsburg in an Uber paid for by All Star. When I got there no cars available. Called All Star multiple times NO ANSWER. Took an Uber back to All Star to retrieve items in car and took Uber home at my own expense. Wednesday, went to Enterprise to obtain rental at my own expense and returned to All Star. They said they were waiting on Rep to further review the car. Today is May 28th and my right knee is now very painful and irritated from driving the rental as the 1st one had broken drivers seat and the 2nd one is still too low. I have spoken to All Star and Hyundai Customer Care to please provide a car rental similar to IONIQ 5 and I have received no assistance. I have spent almost $2000 on Ubers, rentals and gas. Hyundai still has not covered my rental expenses. I have spoken to approximately 16 reps of these companies and have received very few call backs or assistance. Today I called Hyundai Motor Finance to discuss monthly payments for a non-working car at All Star and was transferred and placed on a lengthy hold. No one returned to the phone call. I am seeking your immediate assistance. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORM

- Oakley, CA, USA

The integrated control unit (ICCU) failed immediately after getting the safety recall software installation. Recall maintenance that morning, ICCU failed that afternoon. Heard an audible pop and then multiple warnings went off. Fortunately I was in a location where I could pull over safely, and in a location where I could get help easily.

- Arden Hills, MN, USA

The contact owns a 2023 Hyundai Ioniq 5. The contact received notification of NHTSA Campaign Number: 24V204000 (Electrical System) however, the part to do the recall repair was not yet available. The contact stated while driving 40 MPH, the message "Stop Car - Check Power Supply" was displayed. The contact pulled over to the side of the road, and her husband met her at the location. The contact stated that after her husband restarted the vehicle, a message advising to drive was displayed. The contact stated while her husband was driving 30 MPH, the vehicle decelerated to 20 MPH and stalled. The contact's husband was unable to restart the vehicle. The vehicle was towed to the residence. The local dealer was contacted and informed the contact that the earliest availability for the recall repair was June 10, 2024. The vehicle was not diagnosed or repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure but was unable to assist the contact in locating a dealer who had the part for the recall repair. The failure mileage was unknown. Parts distribution disconnect.

- Nordland, WA, USA

Driving on hwy with 80% charge when we left the house. Loud pop, and complete loss of power in a very dangerous portion of a highway with our baby in the backseat. Almost not able to control vehicle to side of road

- Walnut Creek, CA, USA

12V battery died and vehicle not operable. Luckily vehicle was parked. This has recurred multiple times (3+) Issue has been confirmed by dealer. Not addressed yet. No warning lights of imminent problem

- Bellevue, WA, USA

ICCU failed post software update. Driving home and was suddenly alerted electrical vehicle systems were malfunctioning, and shortly following (1 or 2 minutes), the car flashed a new warning telling me to stop the vehicle. Had I been on a busy highway or a one lane street with low visibility, it would have put me and my wife in danger of being struck by other traffic. Luckily, I was very close to home so I drove home and did not drive the car for a few days. while researching what to do, I had read about the ICCU failure and my problems were similar. I called a tow truck to get it out to a dealer. When attempting to shift the card into drive or reverse, the car would not move. Dealer has determined that my ICCU is in fact bad and is currently in the shop being replaced. Unknown how long this will take.

- Winston Salem, NC, USA

both the 12v battery and the ICCU failed while driving. The dashboard light gave us 1 minute to pull over before the battery system died and the car stopped fully dead. Needing towing to dealership service.

- Alameda, CA, USA

My Hyundai IONIQ5 suddenly lost power while I was driving it. I was only able to go 20 mph for a short period of time before it completely died. I had to have it towed

- Hamilton, IN, USA

The contact owns a 2023 Hyundai Ioniq 5. The contact received notification of NHTSA Campaign Number: 24V204000 (Electrical System) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that while his son was driving at an undisclosed speed, the vehicle stalled. The battery warning light was illuminated. The contact's son was unable to restart the vehicle. The vehicle was towed to the dealer; however, the vehicle had not been diagnosed. The dealer was made aware of the failure but confirmed that parts were not yet available. The vehicle was not repaired. The manufacturer was made aware of the failure and a case was filed. The failure mileage was approximately 8,400. Parts distribution disconnect.

- Teaneck, NJ, USA

I was driving 45 miles per hour on a 2 lane highway, when the car suddenly started beeping, lurched, and dropped to 25 miles per hour (low power mode). After pulling over at a gas station, I was able to run the car in this low power mode for a short time, and then the 12V battery completely died. The main battery in the car was at 78%. There was no warning light that this would happen before making that drive. I took the car in to the dealer and they informed me that the ICCU failed. I see that there is an investigation underway for the 2022 Ioniq 5, and that the 2023 Ioniq 5 has the same components. Please take this investigation seriously as if I were going on a faster highway or more cars were around, it could have resulted in a major accident. This car has just over 10,000 miles and was just purchased under a year prior at the time.

- Easton, PA, USA

First indication something was going awry was when attempting to charge the car. Heard normal click indicating charge had started, but no audible announcement that charging had started. Car started throwing "Check electrical system, " then power plummeted and became unresponsive to accelerator, followed by "Stop car. Check electrical system, " then finally something like, "Battery is being discharged by external devices."** Car had to be towed about 60 miles to nearest Hyundai EV service center. Eight days later, I got a call from service saying that the ICCU needs to be replaced. They will update me once ETA of part is known.

- Goldthwaite, TX, USA