Hyundai Ioniq 5 Complaints

1,350 consumer complaints on file.

#11734215April 28, 2026
POWER TRAIN, ELECTRICAL SYSTEM
ICCU failed at 20,000 miles, 2 years after I first got the vehicle. Blue link showed the P1a9096 ICCU code failure. Car could not be driven for more than a few minutes then the message to stop safely came about and car would die. It took the dealer 2 months to replace the ICCU with the SAME defective part. It is only a matter of time before it fails again.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11734182April 27, 2026
ELECTRICAL SYSTEM, ENGINE, EXTERIOR LIGHTING
Iccu failure. Vehicle stops working completely
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11734162April 27, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
I lease a 2024 Hyundai Ioniq 5 AWD. Prior to a planned trip, the vehicle displayed an electrical system warning. I contacted the dealership and was advised to bring it in. While driving approximately 5 miles to the dealership, the vehicle lost all power including hazard lights, leaving me stranded on a busy road. I contacted roadside assistance and the vehicle was towed to the dealership. The dealership confirmed the failure was caused by the ICCU (Integrated Charging Control Unit). The repair took approximately two weeks. The vehicle was unavailable during this time, requiring a rental car. Hyundai partially reimbursed rental costs but did not compensate for other losses incurred. The ICCU failure is a known widespread issue affecting the entire Hyundai/Kia E-GMP platform across multiple models and model years. A dedicated owner community tracking these failures can be found at [XXX] . The sudden and complete loss of vehicle power including safety systems such as hazard lights while in traffic represents a significant safety risk to the driver and other road users. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11734126April 27, 2026
ELECTRICAL SYSTEM
My car would no longer charge after testing various chargers at home and different public charging stations. If this had happened away from home, and without cell service, I might have been stranded. I took I into the Hyundai service center, and they said the ICCU had failed. They replaced if after waiting a week for the part.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11734110April 27, 2026
ELECTRICAL SYSTEM, POWER TRAIN
2022 Ioniq 5 SE. ICCU failed April 2026 with around 29325 miles. Original owner. Purchased June 2022. I had the original Recall 272 software update performed back in February 2025, but the hardware still failed a year later. **Timeline of Failure:** 1. **Phase 1 (The Trigger):** Level 2 charging stopped unexpectedly before reaching the limit. It tripped my house breaker and unfortunately killed my Level 2 EVSE (Grizzl-E) with a stuck relay. Didn't think too much of it because I had to be somewhere. Car started up normally and I was able to drive throughout the day with no problems. 2. **Phase 2 (The Warning):** The next day, I attempted Level 1 charging. It immediately tripped the breaker. I tried another outlet on a different breaker; the breaker didn't trip, but the car failed to initiate a charge after three attempts. 3. **Phase 3 (Dashboard Error):** After third failed attempt with the L1, I took a peek inside and saw the dashboard had a yellow triangle. With the charger still plugged in, I sat in the driver's seat and turned the car on. The **"Check EV System"** error appeared. I turned off the car and went inside to call the dealer. I called the dealer and they said I can have it towed there. They also scheduled an appointment for the next morning. I went back to car to attempt to position the car to make it easier for the tow truck, but the check ev error was not there when I turned on the car. It said ready and I was able to drive around the block a few times so I figured I'll just try to drive to the dealer. I drove the car to the dealer the next morning. It took **one week** to get my car back. **Diagnostics & Parts Replaced:** The dealer confirmed the following codes and performed a full hardware replacement: * **DTC P1E1300:** AC Power Module Failure * **DTC P1A9096:** DC/DC Converter Fault * **ICCU Part:** `36400-1XAA0-AQQH` * **HV Fuse:** `375F2-GI040-QQH` * **Coolant:** Install of Pink Antifreeze (`00232-19098`)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11733953April 27, 2026
ELECTRICAL SYSTEM, POWER TRAIN
My Hyundai IONIQ 5 has repeatedly lost 12V power and shut down. The vehicle had to be jumped by AAA multiple times. After being restarted, it died again, and after two days of use it was dead again. I am concerned this is related to the known ICCU / 12V battery charging issue affecting IONIQ 5 vehicles, which can cause loss of motive power or make the vehicle undrivable. The vehicle is currently at Hyundai Southern States in Raleigh, NC for diagnosis and repair.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11733719April 25, 2026
ELECTRICAL SYSTEM
ICCU blew while driving and immediately slowed me to 45 mph
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11733713April 24, 2026
ELECTRICAL SYSTEM
Vehicle shut down with minimal warning due to “integrated charging control unit” failure. Vehicle left my wife stranded on rural road. Current mileage is 12k.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11733677April 24, 2026
ELECTRICAL SYSTEM
ICCU and fuse broken
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11733575April 24, 2026
ELECTRICAL SYSTEM
ICCU failed and blew high power fuse. Car displayed warning and only drove slowly. I went to the selling dealer and they confirmed the ICCU and fuse failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11733499April 24, 2026
ELECTRICAL SYSTEM
ICCU Failure & Main Fuse Broken
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11733495April 24, 2026
FORWARD COLLISION AVOIDANCE, ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:SENSORS, ELECTRICAL SYSTEM
See attached document for complaint.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11733413April 23, 2026
ELECTRICAL SYSTEM
The ICCU unit went out rendering the car inoperable
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11733152April 22, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM, POWER TRAIN
As I began a drive cycle, I heard a pop sound and received the “check electric vehicle system” warning associated with ICCU failure. With ICCU failure, if I had continued to drive the 12V battery would have run to zero and the car would have died completely. Vehicle goes to dealer tomorrow for confirmation.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11733134April 22, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
I was driving on the highway when the car suddenly flashed a “check power supply” warning and then immediately shut down. I was traveling approximately 55 mph when the car came to a sudden stop and I was almost rear-ended as a consequence. I was not rear ended because I had a wide shoulder to immediately pull over onto, but if this had happened in a location without a shoulder, it likely would have caused an accident.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11732961April 22, 2026
ELECTRICAL SYSTEM, POWER TRAIN
The car lost power while driving and an electrical warning was displayed on the screen. The issue was later diagnosed as a failure of the ICCU and blown fuse that had been previously recalled and replaced. Now it needs to be replaced again.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11732472April 20, 2026
ELECTRICAL SYSTEM
Vehicle unexpectedly ceased to work. A loud pop sound then a message to check electrical system. Vehicle reverted to “limp mode” leaving me at a max of 15 mph. Terribly unsafe and extremely, concerningly widespread ICCU failure across Hyundai EV models For 5+ years is unacceptable
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11732290April 19, 2026
ELECTRICAL SYSTEM, SEATS, UNKNOWN OR OTHER
Upon delivery of a brand new 2026 Hyundai Ioniq 5 with 13 miles on the odometer, the washer fluid warning illuminated the next day. Reservoir was refilled on 3/29 and was completely empty by 3/30. Vehicle was brought to the authorized dealer on 3/31. The technician confirmed via repair order that the washer fluid hose was actively spouting directly above the ICCU — Integrated Charging Control Unit — a safety-critical high voltage component. Washer fluid was confirmed present in the ICCU floor pan. The cause was a nail severing the washer fluid line. The dealer confirmed the vehicle sat on their lot approximately 70 days before the 3/23/26 delivery date and that washer fluid is factory pre-filled. This indicates the leak was active for approximately 70 days before delivery, during which washer fluid leaked above the ICCU and surrounding electronics. Repair required complete interior disassembly — seats, carpet, center console, floor trim — on a 156-mile brand new vehicle. A full floor wire harness was replaced under Hyundai Techline authorization. Soaked carpet and insulation were salvaged outside rather than replaced. Hyundai Motor America declined to proactively replace the ICCU despite documented fluid exposure above it and denied an extended warranty request covering affected electronics. Safety concern: internal corrosion from extended fluid exposure may not present immediately but can cause sudden loss of drive power — a known ICCU failure mode on this platform subject to multiple prior recalls. Loss of drive power at highway speed poses serious safety risk.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11732158April 19, 2026
ELECTRICAL SYSTEM, POWER TRAIN, FUEL/PROPULSION SYSTEM
Finished charge, low battery indicator on the dashboard. started to drive, within mile "pull over immediatedly" well documented and continued flaw with vechile ICCU component (that I had the software "patches" applied). Car will no longer accept charge (so now has the remaining charge before being a 3 ton brick) and cannot not be driven as if the 12v battery loses charge (which it will) I will lose powersteering and brakes.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11731737April 16, 2026
FUEL/PROPULSION SYSTEM, VEHICLE SPEED CONTROL
I was driving my vehicle on a freeway with 3 passengers when i heard a muffled pop or thud from behind me. A rear passenger confirmed that it came from beneath the rear seat towards the left side of the car. The vehicle speed immediately dropped to less than 40 mph and a warning message appeared on the dash "Check electric vehicle system". I later noticed a red battery icon appear on the left of the dash. I pulled over after leaving the freeway and attempted to resolve the issue by turning off the car, then restarting it. The notice and red battery icon still appeared. I feel that this sudden reduction in speed is a safety issue because I could have been driving at a higher speed (65-70 vs 45-50). Following cars may not have been able to stop in time, or I cuold have been forced to attempt to get off the road by entering lanes with vehicles travelling at a much faster speed. I was about 5 miles away from home on the start of a 400 mile trip so decided to turn around. Back at home I discovered that a new DTC code had been thrown during or after this event - P1A9096. I transferred to another person's cart to complete the trip, and on return arranged for the car to be transported to a manufacturer recommended dealership to check the issue. The Dealership service department conducted diagnostic tests and determined that the issue was caused by an ICCU failure. The have placed an order for a replacement ICCU unit and fuse. Prior to this event there had been no dash light warnings or trouble codes thrown.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

← Back to Hyundai Ioniq 5