Hyundai Ioniq 5 Complaints (2023)

385 consumer complaints on file.

#11725345March 18, 2026
ELECTRICAL SYSTEM
The vehicle is a Hyundai Ioniq 5 electric vehicle. There have been known issues with the integrated charging control unit (ICCU) failing suddenly rendering the car inoperative; I just took it to the dealer and they confirmed a fault with the ICCU. I am up to date with multiple prior ICCU recalls and updates. Leading up to this, a few months ago my 12V battery died unexpectedly at ~22000 miles and I had it replaced. The ICCU charges the 12v battery so I wondered if there was an ICCU issue but the car otherwise was operating fine. Overnight while charging with a level 1 charger at home recently, the car stopped charging overnight unexpectedly. A couple days later I plugged in to charge at home again and got a message "charging unsuccessful", and on the dash I received a message that said "check electrical vehicle system" which went away when I unplugged the car. I tried a different level 1 charger from my wife's car and received the same "charging unsuccessful" message. Interestingly that charger no longer seems to work on her car, so it's possible that my car damaged the charging unit. I then went to try a level 2 charger maintained by the city of Seattle which was operative and had power when I plugged in. On plugging in, I received the same "charging unsuccessful" message and then the light on the level 2 charger went off and the level 2 charing unit lost power. Again, it appears that the fault on my car may have damaged an external charging unit. Thankfully I was still able to drive the car to the dealer where the ICCU failure was confirmed and am in the process of replacing it (they don't have the parts in house and told me the current wait is less than a week though previously had been sometimes months). A service rep told me many customers had the failure happen suddenly with a loud "pop" while the car was in motion causing them to limp to the side of the road or leaving them stranded.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11725084March 17, 2026
ELECTRICAL SYSTEM
My ICCU failed and left my family and I stranded. I understand that this is happening on many Ioniq 5s and that Hyundai has not come up with a reliable solution for this problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723620March 11, 2026
ELECTRICAL SYSTEM
My 2023 Hyundai Ioniq 5 suddenly malfunctioned on Sunday, March 1, 2026. The vehicle abruptly lost power, would not accelerate beyond 25 miles per hour, and then completely died within minutes. This left me stranded on the roadside off the highway, and the car had to be towed to the dealership. It has now been over 10 days, and I have not received any updates regarding the repair timeline, or next steps. This situation is extremely frustrating, as I depend on this vehicle daily. I would greatly appreciate immediate communication regarding the status of my vehicle, including: •Expected repair timeline •What is Hyundai doing to alleviate this massive problem with ICCU? This Hyundai ICCU issue has been around for a few years now, but Hyundai has not provided a lasting fix. Leaving the IONIQ owner to suffer financial and emotional loss. Please get in touch with me as soon as possible with an update, I look forward to NHTSA's prompt response and a resolution to this issue. Sincerely, Dr [XXX] 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
#11723241March 10, 2026
UNKNOWN OR OTHER
Entered car on very cold day. Put heater and defroster on high, drove about a mile and then the window cracked.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723143March 9, 2026
ELECTRICAL SYSTEM
12 volt battery keeps dying for normal reason. It was replaced last year. I have to jump it a few times a day. I'm afraid it will die while I'm driving. I was told at the dealer that it was because I was charging my car in the cold and the 12 volt battery will disconnect to avoid a fire. It was winter. Now we have in 80 degree temperature and the 12 volt battery is dying more frequently
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723038March 9, 2026
ELECTRICAL SYSTEM
I started the car and put down all 4 windows simultaneously. I heard a pop and a dash warning "Check electrical system". I knew this is symptomatic of an ICCU failure and the car will not be driveable for very far. This happened despite having recall work performed for this specific issue in September. That recall work was just a software update, but it is a hardware problem. Hyundai needs to fix the hardware problem. If this had happened when I was at a remote trailhead without cell service I likely would have been stranded. Fortunately I was able to drive 1-2 miles home and get the car towed. I was without a car for 4 days until Hyundai could get me a loaner vehicle. Unknown how long repair will take. Unknown what reliability will be after repair, if they just replace the ICCU with another that has the same potential fault.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11722925March 9, 2026
SERVICE BRAKES, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
On [XXX], I received a warning on my 2023 IONIQ 5 that said “stop vehicle and check braking system” and the car went into “turtle mode”. I took it into the dealer for repairs and they said the issue was related to the 12V battery and returned the car to me as repaired. Then, on [XXX], I was driving the car and I got the same error message but this time the car’s brakes didn’t work. Thankfully, I was able to pull off the surface road I was on and pulled into a residential area where I used the parking brake to stop the car. I then had it towed to the dealer and they are currently in the process of repairing it. My son and I were in the car at the time of the [XXX] incident and were very fortunate that we did not hurt anyone or ourselves when the brakes didn’t work. As of today, the Hyundai dealer (Roseville, CA) says they are repairing a brake component that was defective but they missed this on the 2/28/26 inspection. See attached photo of the warning indicator. 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
#11722410March 6, 2026
ELECTRICAL SYSTEM
I received a "Stop vehicle and check power supply" alarm on my dash after starting the car and leaving a parking garage. Then a "12V battery voltage low" message along with the "turtle mode" icon which limits the car to under 20 mph. I pulled over to a side street as I did not want the car to die on a main road and impede traffic or get hit. I called roadside assistance and the car was towed to the dealership.(1/16/2026). On Tuesday (1/19/2026) I was informed that the ICCU (Integrated Charging Control Unit) had failed. The dealership ordered the part(s) to be replaced and stated 5-7 days turnaround. Called dealership every 10 days or so, but was told there was no ETA for the parts delivery. On Thursday 3/6/2026 (48 days) received a text that the car was ready to be picked up. The ICCU and associated fuse was replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11722334March 5, 2026
UNKNOWN OR OTHER
I own a 2023 Hyundai Ioniq 5 that experienced a battery failure while still under warranty. The vehicle became completely undriveable in late November 2025 and had to be towed to a Hyundai dealership. The vehicle has now been sitting at the dealership for more than 90 days waiting for a replacement battery with no repair completion date provided. The dealership indicated that the required battery component is unavailable or on extended backorder. While a loaner vehicle was provided, the original vehicle remains unusable for an extended period due to a major battery defect. This raises concerns about reliability and the availability of critical components needed to repair electric vehicles when failures occur.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11722144March 5, 2026
ELECTRICAL SYSTEM, ENGINE
On Sunday, March 1, 2026, my vehicle suddenly malfunctioned while I was driving. The car abruptly lost power, would not accelerate beyond 25 miles per hour, and then completely shut down within minutes. This left me stranded on the roadside off the highway, which was both dangerous and extremely distressing. The vehicle was towed to the dealership, and it has now been four days with no updates regarding the diagnosis, repair plan, or estimated timeline. I have repeatedly attempted to get information but have received no meaningful communication. This situation is unacceptable for a relatively new vehicle and raises serious safety concerns. In addition, I rely on this vehicle daily and am currently without transportation.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11721884March 4, 2026
ELECTRICAL SYSTEM, ENGINE, POWER TRAIN
Having the same ICCU Failure that all other Ioniq 5 owners have. On February 26th, I was heading to work when I heard a pop and car displayed warning lights saying check EV system and stop safely. Car was limped home and towed to dealer. Was told fix will take a month.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11721603March 2, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM, VEHICLE SPEED CONTROL
My wife was driving our Ioniq 5 on the freeway. She received a message on the dash about the electrical system (probably ICCU failure), and then the car limited itself ("turtle mode") so that the max speed was 20mph. A minute or two later it slowed down even further to 10mph. She was able to get off the freeway safely.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11721448March 2, 2026
ELECTRICAL SYSTEM
ICCU failed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11721059February 27, 2026
ELECTRICAL SYSTEM
On the morning of January 23, 2026, the ICCU Assembly and fuse failed when driving on a freeway in moderately heavy traffic. I was driving about 55 mph when I heard a pop from somewhere behind me. A warning message came on the display to check the electrical system along with a battery symbol. The car lost power. Losing power like that on a freeway was not at all safe. It could only go about 25 miles per hour. I had to drive on the shoulder of the freeway with my hazard lights flashing until I reached an exit ramp to get off the freeway. I parked on a side street in a residential area where I felt safe, turned off the car, and waited. I turned it back on. The message was still there so I called for a tow. The 12-volt battery was completely dead by the time it got to the dealers and had to be jumped to be able to park it. The original ICCU had already been replaced in November of 2024, so this was a failure of a replaced part. The car was at the dealer for 19 days before it was repaired due to the wait for the parts to be shipped. What component or system failed or malfunctioned, and is it available for inspection upon request? The ICCU and fuse failed but I don't have the part since it was replaced by the dealer. How was your safety or the safety of others put at risk? Losing power on a freeway when cars are traveling at high speed is not at all safe. I could have been rear-ended. Luckily I was able to get to the freeway shoulder without incident and travel on the shoulder to get to a safe place. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. They diagnosed it and replaced the failed part. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Unknown. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No. The warning message popped up at the same time as the loss of power.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11721036February 27, 2026
ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
ICCU Failure causes the car to not work.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720902February 27, 2026
ELECTRICAL SYSTEM
The car gave a Check Electrical System warning when I tried to start it, which disappeared after a moment. When I put it in gear it said limited power, then after sitting on for a few minutes to see what would happen a warning to stop vehicle and check power supply. After towing to dealer it was verified to be a failure of the ICCU. This is the second ICCU failure I have experienced in this car. The replacement part is on back order with no eta.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720515February 25, 2026
ELECTRICAL SYSTEM
ICCU failure after ~16k miles of ownership. Car cannot charge via AC charging and cannot charge the 12V battery.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720460February 25, 2026
FUEL/PROPULSION SYSTEM
ICCU failure, stranded wife and kids in the Minnesota cold. This issue is not fixed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720400February 25, 2026
ELECTRICAL SYSTEM
The ICCU of my vehicle failed and couldn't charge using AC power which also caused my 12V battery to fail. The car has had the old recall completed month prior to this failure so Hyundai didn't replace the defective part just updated software in hope the defect wouldnt happened. Regardless the defect happened and the car while still under warranty has not been fixed in 57 days. Hyundai states my vin has no ETA for part to be delivered and fixed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720282February 24, 2026
POWER TRAIN, ELECTRICAL SYSTEM
During level 2 AC charging the circuit breaker in the house tripped. Tried again on a level 1 charger that came with the car and again it tripped the home circuit. Again, the car overloaded the house electricla system to a point it tripped the circuit breaker. Car taken to dealership for repairs. Dealership trouble shooting identifed failed ICCU with burnt connecter pins. HyundaiCase Management number 42152269 THIS IS A FIRE HAZARD FOR THE CAR AND HOUSE.
Crash:
No
Fire:
Yes
Injuries:
0
Deaths:
0

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