2022 HYUNDAI IONIQ 5 Complaints

On January 31, 2025, my 2022 Hyundai Ioniq 5 experienced a failure with its ICCU resulting in the vehicle to lose all power and become unable to be turned on exposing myself and others to conditions where the vehicle could become a serious safety hazard due to its complete lack of power. This occurred despite the application of the NHTSA Hyundai Recall 272 only two weeks prior to this incident which was supposed to prevent this serious safety defect from occurring. The vehicle's 12 V battery was subsequently replaced allowing the vehicle to display a "Check electric vehicle system" warning. The dealership has since confirmed this as the ICCU defect. No warnings or other messages preceded this incident.

The contact owns a 2022 Hyundai Ioniq 5. The contact stated that the electrical charger was overheating, and the 12-volt battery was draining without warning. The contact stated that while charging the vehicle, the contact heard an explosion. The contact stated while driving 20 MPH, the message "Stop Driving Immediately - Return to Dealer"; the check engine warning light illuminated, and the vehicle experienced a loss of automotive power. The contact stated that on one occasion after turning off the vehicle, the battery remained active for 3 days, causing the battery to become drained. The vehicle was taken to a local dealer where the vehicle was diagnosed and the contact was informed that the water pump, the EV battery, the charge point, the inside batteries, the sensors, the navigation system, were faulty and needed to be replaced. The vehicle was repaired; however, the failure persisted. The manufacturer was notified of the failure. The approximate failure mileage was 65,000.

My 2022 Hyundai Ioniq 5 has experienced numerous 12V battery failures since early 2024. I ended up having to replace the 12v battery five separate times. The car fails to start with no warning. It has stranded me while transporting a pregnant spouse and a sick infant. Each failure required a tow and service visit. Hyundai claims “battery case corrosion” is to blame, but this is clearly a systemic electrical defect affecting many owners. This is a critical safety issue for families relying on the vehicle in emergencies. This is a safety and accountability issue affecting many families.

15 miles south of Crescent City California, "Check EV system" warning displayed, and power immediately tapered to a crawl in 30 seconds or so. No earlier warnings appeared. Car was towed to Northwoods Hyundai in Eureka where the problem was identified as ICCU failure. No parts appear to be available, and car has been sitting in the elements now for over 6 weeks, 300 miles from home. No repair date has been indicated, and the new ICCU is still back ordered.

Driving on the highway/freeway, received an error message on dashboard "stop vehicle and check power supply". The car slowed down, max speed around 45 but thankfully my hazard lights still worked and I exited the next exit. I've heard I was lucky as some people with the same problem - the car goes into "limp" mode and slows down to 5mph or stops completely. Very unsafe on a highway for everyone. Dealer has checked the vehicle and states it's an ICCU problem

Hyundai Ioniq EV's have a continuing issue with a component called that "ICCU". The ICCU and high voltage fuse failed even after two recalls meant to monitor that problem and update the software. Luckily, mine failed in my driveway at home which did not put me in immediate risk. However, many people have this part fail while driving on roads and highways with zero warning. There have been two ICCU-related recalls that my car has had. When I started my vehicle I heard a "pop" and then the dashboard said "Check vehicle electrical system" and then shows the "limp mode" icon allowing to drive the vehicle at a slow speed to safety.

Recall 272 was addressed on Dec 31, 2024. ICCU and fuse replaced; software updated. On 4/26/2025, 'Low voltage on the 12 volt battery, stop safely’ warned came on when I tried to start the car. The car was used several times earlier in the day and is used daily (i.e., does not sit idle). No other warnings were noticed prior to this failure.

The contact owns a 2022 Hyundai Ioniq 5. The contact stated while driving approximately 25 MPH, the vehicle lost power with the message 12-Volt battery low. The vehicle was towed to the dealer and was repaired under NHTSA Campaign Number: 24V868000 (Electrical System) and 24V204000 (Electrical System). The contact stated that approximately three weeks later while the vehicle was parked, the message 12-Volt battery low was displayed on the instrument panel. The dealer was contacted, and an appointment was scheduled three weeks in advance. After driving the vehicle to the residence and the vehicle was parked, the vehicle failed to start. The battery was recharged for 15 minutes, and the vehicle was able to start. The vehicle was towed to the dealer; however, the vehicle was not repaired. The manufacturer was informed of the failure and opened a case. The failure mileage was 4,000.

ICCU failure resulting in inability to charge or drive. Thankfully, occurred while pulling into driveway as there were no previous warnings and app still indicated that “all systems normal”.

Leaving an appt and the car gave a battery ! Warning. While is was looking for a place to pull over the Stop Check Vehicle Electric System. I pulled into a parking lot when the Turtle came up and I was barely able to back into a space. The car was dead within 10 mins of leaving until I parked. I commute daily on an interstate and that would not have given me much time to pull of the interstate to a safe location. Longer warning is needed. Dealer has the car and confirmed it is the ICCU unit and no eta on the part. Yet they are selling 2025 Ionic 5.