2023 Hyundai Ioniq 5

These are unverified consumer reports filed with NHTSA, shown as submitted.

• 12/30/2025· ELECTRICAL SYSTEM

  ICCU failed causing car to be unable to be charged. If driven any further it would have eventually stopped working.

• 12/29/2025· ELECTRICAL SYSTEM,ENGINE

  I purchesed the Hyundai ionic 5 2023 from hyandai dealer ship. It had 42 k miles. The car ran good. So I got it. They promised me before the I bought they would charge it up free. When I signed the paper they said they couldn't charge it for me. I drove 5 miles the original battery died. I almost got to accudent only 5 miles away. I figured it was original battery. I change battery. I get tow truck to take home i put new battery in it. Then 5 days later the main iccu stopped charging. Another 12 bolt battery drain. They new it had that problem. Two batteries are main iccu won't charge. They make me sign paper buy as is i didnt think it would die 5 miles later they new it had a serious problem I look on internet the same car had recalls for the same car not on mine My car should have been recalled I heard 1000 s were affected with the same problem. They new it would fail on me thars why they get me to sign the papers. I hooe it's not 21 k down the drain I hope i dont have to spend 15 k on new iccu.

• 12/28/2024· ELECTRICAL SYSTEM

  I was sitting in my parked vehicle, which I had just turned on. It was cold so I turned on the seat warmer. About a minute later, I hear a pop and saw a “check electric vehicle system” warning on my dash, followed by an audible alarm and a new “stop vehicle and check power supply” warning on the dash. I decided to have the vehicle towed to my local Hyundai dealer.

• 12/28/2024· ELECTRICAL SYSTEM

  While driving on a 45 mph speed limit road, there was a "pop" noise and then alarms on the dash display that power was limited and stop the car. The car's speed was severely limited to about 10 mph for a few seconds while I pulled the car over, and then the car died. Everything was electrically dead. I couldn't even turn on the hazard lights or lock or unlock the car. I took a video of the dash display rapidly alternating between two alarm messages, "12V battery storage low. Stop safely." and "power limited." This website wouldn't let me upload the video, so I saved screen shots of the two alarm messages from the video. Shortly after I stopped the car, it all went dead. It scares me to think what would have happened if I had been on the interstate when this occurred.

• 12/27/2024· ELECTRICAL SYSTEM

  I was driving the car 70 miles per hour in a highway. Car suddenly stopped and only go 5 mph. I was lucky no car behind me. If not I could be death today. I brought it to service and ICCU unit failed which is happened almost all Hyundai IONIQ 5. They replaced it with same ICCU and it will happen again. I think they want me to make an accident next time. This car is not safe to drive with this charging unit.

• 12/26/2025· POWER TRAIN,ELECTRICAL SYSTEM

  Car gave an error check electrical system and went into limp mode on highway slowing to 25mph.

• 12/25/2024· ELECTRICAL SYSTEM

  We were driving our vehicle in a parking lot while on vacation and we got an error message “check electric vehicle system”. It then displayed the error message “stop safely and check power supply”. Four months ago, we had the same problem and had our 12 volt battery replaced and our ICCU updated. Our vehicle lost power while we were driving. We were able to drive the car safely to a hotel. But the ICCU needs to be replaced.

• 12/23/2025· POWER TRAIN,ELECTRICAL SYSTEM

  I purchased my Hyundai Ioniq 5 on [XXX]. Since then, I have experienced repeated and dangerous failures of the air-conditioning system, which Hyundai and the selling dealership have failed to properly diagnose or repair. On [XXX], while driving, I heard a very loud banging noise coming from the front passenger side of the vehicle. Immediately afterward, the air-conditioning system completely shut down and stopped producing cold air. Before the extreme Arizona heat began, I repeatedly asked Hyundai on Bell Road in Glendale to properly diagnose the A/C system due to ongoing concerns. Despite the vehicle being under warranty, the technician told me I would have to pay a diagnostic fee before they would evaluate the A/C. As a result, the underlying problem was not properly diagnosed or repaired. On [XXX], the exact same failure occurred again the same loud banging noise followed by a complete loss of air conditioning. The vehicle was taken to Hyundai on Bell Road in Glendale a total of four (4) times, spending 33 days out of service for the same issue. Despite this, the dealership failed to repair the vehicle. On several visits, the car was simply parked, and the dealer later claimed it had been “fixed” one time, even though the problem continued. This defect created a serious safety hazard. During one incident, while driving the vehicle in extreme heat to the dealership for repair, the interior temperature became dangerously high. My phone overheated and shut down, and I nearly passed out while driving. Hyundai Corporate has been unresponsive and dismissive. Rather than addressing the repeated failures and safety risks, I was referred to Lemon Law, where my claim was denied, despite the extensive repair history and time out of service. Instead of repairing the defect or taking responsibility, both the dealership and Hyundai Corporate pressured me to trade in the vehicle and move on, without resolving the underlying problem. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

• 12/23/2023· AIR BAGS,SERVICE BRAKES,FORWARD COLLISION AVOIDANCECrash

  The car proceeds by itself and does not stop even when brakes are engaged. This happened 2 times. Once in reverse and once forward, both caused severe damages to the car. In the forward incident, the driver was wearing seat belt but air bags deployed with impact.

• 12/21/2025· POWER TRAIN,ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM

  INCIDENT DESCRIPTION: On November 24, 2025, while driving at ~60 mph on NYS Route 17 (highway) with ~15% battery charge, my 2023 Hyundai IONIQ 5 suddenly entered limp mode and lost motive power. The high-voltage battery state of charge dropped instantly from ~10-15% to 0%, triggering error code P1B9600 (HV battery cell imbalance—cells failing to charge/discharge properly). I was unable to fully remove the vehicle from the roadway. My elderly mother was a passenger; a passing tractor-trailer came within 1 ft of striking us when disabled. NY State Police responded (report available). Required $300 tow to the Hyundai dealer, stranding us 150 miles from home.//PRIOR RELATED FAILURES: 1. November 14, 2025: Stranded due to ICCU failure (recall 24V-868 related) (stranded on NYS State Route 444). 2. September 15, 2025: Same P1B9600 code/limp mode/power loss; stranded in the middle of active travel lane of NYS 444; NY State Police report filed. 3. August 2025: Initial HV battery-related sudden power loss; stranded on Interstate 90 Eastbound (Erie, PA area). Despite repairs (September 2025 ICCU/"limp mode" software updates; October 2025 ICCU/high-voltage fuse replacement under recall 24V-868), defects persist. The vehicle charge rate also appears low and the battery consumption rate seems high.// CURRENT STATUS: Dealer (Vision Hyundai) confirmed high-voltage battery pack defective, requiring full replacement. Vehicle purchased new October 2024, under warranty. In service since mid-November 2025 (>30 days downtime). Provided loaner now, but prior rentals unreimbursed.//SAFETY RISK: Repeated sudden power losses create extreme highway crash risk, especially with vulnerable passengers. I am a licensed professional mechanical engineer, and can provide technical logs, repair orders, police reports upon request.The issues I have experienced appear to be linked to ongoing ICCU/HV system issues in IONIQ 5. I respectfully request expansion of the recall investigation.

• 12/20/2025· LANE DEPARTURE,FORWARD COLLISION AVOIDANCE

  Due to a heavy brake application a water bottle in the back seat spilled and the water traveled under the drivers seat. This resulted in multiple car systems going offline, vehicle reporting LKAS error and inability to turn the car off. This essentially bricked the vehicle. Repair in order to correct the shorts and corrosion from the water both the drivers seat and main floor wiring harnesses require replacement cost estimate approximately $12,000. These key electrical connections under drivers seat are not adequately protected from simple water damage. This in my opinion makes the vehicle unfit for use as a family EV SUV as a simple water bottle still should not be able to brick a car. I consider this a design defect and the manufacturer is not covering this under warranty.

• 12/19/2025· ELECTRICAL SYSTEM

  My vehicle has experienced three separate failures of the Integrated Charging Control Unit (ICCU) and two separate 12-volt battery failures. All manufacturer recalls related to the ICCU have been completed. Each of these five events required towing and resulted in either an inability to start the vehicle, or a sudden loss of power while driving, including limp mode. During multiple events, the vehicle displayed a warning message stating “Stop vehicle and check power supply” accompanied by a red battery icon. The sudden loss of power created a serious safety risk to me and to others on the road, particularly when the vehicle lost propulsion unexpectedly. In each case, the vehicle became unsafe or impossible to operate. For every incident, the problem was diagnosed by authorized Hyundai dealer, and I was informed that the issue had been repaired. Despite these repairs and recall actions, the same failures continued to occur. These repeated ICCU and 12-volt battery failures demonstrate an ongoing electrical system defect that has not been permanently corrected and presents a continuing risk of sudden power loss.

• 12/19/2025· ELECTRICAL SYSTEM

  Got "check electric vehicle system" warning message when backing into my parking space. Later, when I turned car on to leave, it went into limp mode in the parking lot. Had car towed to Lithia Hyundai of Reno. ICCU failure was determined.

• 12/19/2023· ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM

  This model has known issue. As I found after it occurred to my brand new IONIQ 5 . It has only 320mi. It had 87% battery and all of sudden it stop on road. No power on dashboard. After taking to service station they found “ "Inspected and found code P1A9096- DC/ DC converter input voltage sensor fail. Referenced campaign 997 for concern. With code present, per TSB, replace ICCU and fuse." This same issue I noticed in 2022 after reading forum. After putting my car in service station still I don’t have my car. It’s almost 17 days. If this car had recall I could have saved my time and unnecessary effort. Plus thank god it was local city read( school zone) if I was in highway and same thing happen to me it might be life threatening situations.

• 12/19/2023· ELECTRICAL SYSTEM,SERVICE BRAKES,BACK OVER PREVENTIONCrash

  Intermittent Electrical / Brake failure . Put vehicle in reverse . Brakes failed to stop vehicle . Vehicle has had electrical issues before . Waring lights came on for steering and tire pressure in the past . Recall then came from Hyundai for the ICCU .45 minutes before the collision, the front collision warning came on when I was stopped at an intersection with no one in front of me . I stopped the vehicle and turned the vehicle off . Turned on the vehicle and it reset the warning lights and sounds , and I continued to drive . Later while pulling out of a parking space in reverse ,I stepped on the brakes but the vehicle did not stop . I pumped the brakes to no avail . After the collision , the brakes worked again when the tow truck driver placed the vehicle on the flatbed .The Hyundai dealer , after the vehicle had been in their possession for several weeks with the battery disconnected, said there was no problem They also had a factory rep look at the vehicle and he made a report . We have not been able to get a copy of the report . Vehicle is still at the dealership . When notified by the factory rep of their claim that the vehicle had no problems , the vehicle had been out of service more then 30 days .

• 12/15/2025· ELECTRICAL SYSTEM,UNKNOWN OR OTHER

  On 12/13 while driving back home at a red light at night, we heard a loud pop at the driver's rear side and suddenly the dash displayed a warning stating "Check electric vehicle system". The car then would not drive past 25 mph and kept flashing the warning. We got it home safe, and planned on dropping it off at the dealership the next day after jumping it. The next day however, after multiple attempts to jump the car's battery, it would not start enough to move it. The car would start and then flash a warning saying that the 12V battery voltage is low and then shut off again. It had to be towed on 12/15 to the dealership where they will be doing an diagnosis.

• 12/11/2025· UNKNOWN OR OTHER

  I am reporting a safety concern with my 2023 Hyundai Ioniq 5 related to Hyundai placing remote safety features behind a paid subscription. Hyundai has locked two functions that affect safety: (1) the ability to remotely check the vehicle’s battery state of charge, and (2) the ability to remotely unlock the doors from a phone. These functions previously existed under BlueLink but were removed unless the owner pays for the new Connected Services package. 1. Remote battery status Without paying the subscription, I cannot check the vehicle’s battery level while it is charging. If I need to leave the charging area or am charging from home and not directly watching the dashboard, there is no way to verify whether charging completed or stalled. Charging interruptions are common with EVs. This could leave me stranded unexpectedly in unsafe conditions, at night, or in severe weather. This is a safety issue, not a convenience issue. 2. Remote unlock Hyundai also removed the ability to unlock the car from my phone unless I pay for the subscription. This creates a safety hazard if a child accidentally locks themselves in the car with the key fob inside. Without remote unlock, the parent may have to break a window or wait for emergency responders, which creates risk of heat or cold exposure to a child. This problem is reproducible every time I attempt to use the app without a paid subscription. Hyundai has been contacted and has not offered a safety solution except paying the subscription fee. I am asking NHTSA to review whether locking basic safety functions behind a paywall creates a safety defect that could put vehicle occupants at risk.

• 12/06/2023· ELECTRICAL SYSTEM,SERVICE BRAKES,FORWARD COLLISION AVOIDANCE

  The following is an incident that happened yesterday to my wife, who is an experienced driver: Whilst driving south on I5 from Seatac toward Tacoma in heavy rain with surface spray the screen above the steering wheel mentioned collision avoidance was not working and radar was not working. When I applied the brakes to slow down no response from the brakes. I then let off the brake and tried several times to apply the brakes each time with no success. I still had full control of the steering and could still steer the car. This lasted for about 30s then the brakes started working again. The error messages regarding collision avoidance and radar not working would continue to pop up even after the brakes were working. After stopping the car and turning it off and restarting several hours later the car no longer displayed any error messages. No vehicle or passenger were hurt in this incident, however if the traffic had slowed or stopped this outcome could have been very different.

• 12/04/2025· ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM

  While driving on the freeway I heard a pop and a saw a warning notification on the dashboard to check the vehicles electrical system. This was followed by a warning that power was limited which resulted it the vehicle speed decreasing to 30mph, and finally a notice to stop the vehicle immediately. All of this occurred in about 5 minutes time. Thankfully, I was able to pull over to the side of the road without an accident. After this the vehicle became inoperable including hazard flashers. I had to wait on the side of the freeway for about an hour to get a tow. The vehicle was towed to a dealer which confirmed that the ICCU and high voltage fuse were faulty. My safety during this process was put at risk because A) during a snow storm I had to pull the vehicle over to the side quickly across 4 lanes of traffic and B) then remain parked on the shoulder with limited ability to notify other drivers that I was on the shoulder. The dealer has confirmed the failure, the vehicle is available for inspection, and the manufacturer has not inspected the component.

• 12/03/2025· UNKNOWN OR OTHER

  The car was fully charged and all of a sudden displayed a limited power warning and stopped driving completely. We were stuck on a road and had to get a tow truck. The tow truck was able to get power to the battery to drive it up on the bed. It was fully dead -couldn’t even unlock the doors. It’s been at Hyundai for 3 days and they are replacing the ICCU fuse. From what I read this is a very common issue

• 12/01/2025· ELECTRICAL SYSTEM

  12 volt battery keeps dying. I have had the car for 2.3 years and am now on my 4th 12 volt battery.

• 11/28/2025· ELECTRICAL SYSTEM,UNKNOWN OR OTHER

  My EV failed to charge using a home or public charger. The dealership determined that the ICCU of my Ioniq 5 failed and replaced it under warranty. I previously had evey software update and recall related to the ICCU performed, yet it still failed.

• 11/26/2023· POWER TRAIN

  The car does not switch from Reverse to Drive under certain conditions, resulting in uncommanded reverse motion. Gear selection on the Ioniq 5 is controlled by a twisting knob at the end of a stalk on the steering column. Drive is selected by turning upwards, Reverse by turning downwards. The moving part springs back into the neutral position once a gear is selected. Occasionally the car does not switch from Reverse to Drive. This is extremely dangerous as the vehicle shoots backwards when the driver is expecting it to move forward. A driver will likely press the accelerator more firmly after having physically moved the gear selector to Drive and expecting the vehicle to move forward. Since this happens after backing up, it is likely that obstacles or persons are behind the car when this happens, and absent a very fast reaction by the driver this will result in accidents and injuries. The issue is triggered when the car is not at a complete standstill when Drive is selected. Even barely noticeable residual backward motion triggers it. There is no haptic feedback to alert the driver that the car ignored the driver input. As drivers are expected to pay attention to their surroundings when maneuvering, visual feedback (via the gear indicator on the stalk and possibly a dashboard notification) is not useful. There is a small auditory cue, but it is easily missed when in a conversation or listening to music, especially because the car frequently dings, pings, and beeps for other reasons. Not to mention, hearing-impaired drivers will also miss this. The driver should not be able to physically move the gear selector into the Drive position when the car is not accepting that input - the twisty bit should be locked out to prevent this. Or at the very least, if a crucial driver input is discarded, the car should instead default to a safe behavior, i.e. put the car in Neutral instead of Reverse.

• 11/22/2025· ELECTRICAL SYSTEM

  A water bottle spilled from back seat during sudden deceleration due to traffic. Thd bottle hit the back of the drivers seat and some of the contents spilled, I felt moisture from under seat on my ankles. Shortly after the car systems started reporting they were not working. By the time I returned home not even the turn signals worked and I could log turn off the EV. Car towed to desler who determined there are critical electrical connectors under the seat that showed signs of a short and corrosion. This is not covered by manufactures warranty and thd dealer presented me with an estimate over 11,000 to replace the drivers seat and floor wiring harnesses. I also filed a chain under my comprehensive insurance which was denied as the insurance company believes the corrosion was ongoing vs an all of the sudden issue. I believe the Ioniq has design flaws as critical connections should be better protected. Kids in thd back seat and front seats can frequently spill things and this fat seems way to fragile with this type of design. This problem occurred October 9th and the car is still with the dealer I need help please.

• 11/20/2025· LANE DEPARTURE,FORWARD COLLISION AVOIDANCE

  Several times now the "Check Driver Assistance System" and "Check Lane Assist System" have come on and stayed on. I brought the car dealership, and they fixed it--but only temporarily--the problem recurs within a few days of the fix. All of the sensor cameras are clean. I have read that a weak 12-volt battery can cause this problem, but the car has only 28k miles on it, so the battery should not be weak yet. I will bring the car back to the dealer (again) and have them check the 12-volt battery strength. But I am at the point where the "check system" messages are on more than they are working correctly.

• 11/19/2025· ELECTRICAL SYSTEM,ENGINE,FUEL/PROPULSION SYSTEM

  ICCU failure, confirmed by dealer. Vehicle was parked in garage connected to charger. The ICCU fuse blew, and the house breaker was tripped. The vehicle failure also ruined the Grizzl-E EVSE (charger).

• 11/17/2024· POWER TRAIN,ELECTRICAL SYSTEM

  The ICCU failed, leaving the car with a Check Electrical System failure and ultimately cutting power to the vehicle, forcing driver to pull over and stop.

• 11/14/2024· ELECTRICAL SYSTEM

  My new 2023 IONIQ 5 became inoperable on 3 occasions when it completely lost power. This situation unquestionably impaired my safety on the first occurrence of power failure that happened without warning while I was driving; fortunately, I was able to coast to the side of the road without incident. In my repair visits to Hyundai dealers, the integrated charging control unit (ICCU) updated (twice) and the depleted 12-volt battery was charged. Repair visits resulted in loss of use of my car for a total of 31 days while it was in service. The 12-volt battery finally had to be replaced on the last dealer visit because it had could not hold a charge. The battery was barely a year old. No Hyundai dealer could assure me that the problem with the charging system was resolved. It was suggested that annual replacement of the 12-volt battery before the end of its normal lifespan might be required to avoid the serious safety risk of power failure while operating the vehicle. Hence, I am not driving my car with confidence that the safety risk risk was alleviated. I understand that Hyundai Motors acknowledged the ICCU problem and addressed it with a new ICCU in the 2025 Ioniq 5 model year. However, in my case, I have a still-new, expensive vehicle that I drive without feeling 100 percent secure that I am safe.

• 11/13/2023· FORWARD COLLISION AVOIDANCE

  I'm surprised there are no safety recalls on this vehicle given how Cruise Control operates & how close to the Cruise Control toggle switch the steering wheel is indented for hand placement at 10 a.m./2 p.m.We purchased a 2023 IONIQ 5 on 02/25/2023.When the vehicle was delivered to us we were not told that the cruise control does not disengage when the brake pedal is applied.It merely pauses.There is nothing in the owner's manual that addresses cruise control operation.In any other vehicle we have owned, including other Hyundai vehicles, cruise control cancels when the brake pedal is depressed.Without proper training/information & without cruise control being addressed in the owner's manual we had no way of knowing this.2 months after purchasing the vehicle, while pulling into a parking space driving 3 MPH I stepped on the gas & the vehicle returned to the previously set cruise control of 45 MPH.Whereupon it went over a parking bumper, landscaping, curb, $ into a busy street, scraping the passenger rear portion of the vehicle & damaging the wheel.We took the vehicle to the dealership, Larry H. Miller on 05/03/2023. They were unable to duplicate the mishap.The GM of the dealership indicated that in all probability what occurred was inadvertent touch of the toggle switch.He indicated that this unique cruise control operation was experienced by others, including himself.On 05/24/203, he recommended we contact Hyundai Motors USA to report the incident.Doing so resulted in numerous phone conversations, emails, and 2 inspections of the vehicle. Finally, on 10/19/2023 we were advised in a HMAUSA letter of resolution that said, "no manufacturing defect was identified." They are refusing to pay the $2,247.92 repair bill (on 04/26/23.May be higher now due to rising costs.)We maintain the incident occurred due to a design flaw & unique cruise control operation.We not only want Hyundai to pay for the repairs, we want the NHTSA to investigate so this won't happen to anyone else.

• 11/11/2024· ELECTRICAL SYSTEM,ENGINE

  I started my car and after a minute I received a warning saying to check my electrical system and safely pull over. After 5 minutes of trying to drive to the dealership the car suddenly slowed down to a max speed of 27mph and then shortly after slowed to a stop and turned off. The car would not turn on and eventually the 12v battery died. I tried to jump the car but the 12v would not stay charged long enough to put the vehicle into drive. It appears the ICCU is not working and cannot keep the 12v charged to make the car function .

• 11/10/2023· ELECTRICAL SYSTEM

  Stop vehicle and check battery supply error and the car died. No power whatsoever. Likely linked with the faulty ICCU issue.

• 11/07/2023· VEHICLE SPEED CONTROL

  When driving my new Hyundai ionic 5, the dashboard display is set up such that when I am in my preferred seating position, and my hands at 10 and 2 on the steering wheel, I cannot see the spedometer reading. I basically don't know how fast I'm going and less I change my hand position or move my head. This requires a fair more amount of time for me to take my attention off the road. This is not an isolated incident. I have asked my friends, who range in height from 5'2 to 6 ft 3 to do the same thing. They all report the same problem when they are in their preferred seating position. I am also noted many complaints about the same issue on the ionic 5 internet boards. This problem is caused solely by Hyundai's choice of a main display layout. This is the way it is laid out from the factory, and there is no way to change the speedometer position on the main display as a user.

• 11/04/2025· FORWARD COLLISION AVOIDANCE,LANE DEPARTURE

  I suddenly received errors that my sensors weren’t working, and I can no longer use my cruise control. The car has less than 60,000 miles so it still has the full bumper to bumper warranty. I have never had a collision. So I took it in to the dealer and they said the camera was mis-aligned and is not covered under warranty. It should be covered as I’ve never had a collision. Based on my online research, many people with Hyundai Ioniq 5s have experienced this same issue at no fault of their own, so it is a systemic problem. I took the vehicle to the Pohanka Hyundai in Fredricksburg, VA

• 11/03/2024· ELECTRICAL SYSTEM

  Car lost power due to electrical supply--12v/ICCU failure. Warning on dash instructed me to stop vehicle immediately. Car is currently at dealership and inoperable.

• 11/01/2023· UNKNOWN OR OTHER

  The car driving selector order is Drive, Neutral, Reverse which is the wrong order. It should be Reverse, Neutral, Drive, which is the same for all the cars I have driven since the late 1960's. In fact, the Hyundai Santa Fe has the correct order. Also, my Volvo XC60 has the correct order. I thought that your standard 571.102 addressed this problem. I am having the same problem selecting the wrong drive when I go from my Volvo to the Ioniq 5.

• 10/28/2024· SUSPENSION,STRUCTURE,WHEELS

  The lower control arm broke off of the subframe during daily commute on the highway, which left the car completely immobilized and had to be towed. The incident could've been a lot worse if I had lost control of the car and swerved into others on the road. vehicle is currently being inspected by Hyundai dealership. Prior to the incident, there were no warning lights or symptoms.

• 10/28/2023· ELECTRICAL SYSTEM,ENGINE

  I started getting the error Electric Vehicle System error in my month old Ioniq 5. After driving a few miles, the air conditioning stopped working completely. And after a few more miles, the vehicle started to throttle down the speed to 20-25mph that too on the I95 with a 65mph speed limit. Had to turn on the emergency lights and drive slowly till I reached my destination. After googling for a while, I found that this issue is related to the ICCU failure that is pretty common in the Ioniq 5 and Hyundai is yet to issue a permanent fix for this problem. I don’t know why we are allowing the sale of these vehicles with known issues. You can even Reddit the ICCU issue.

• 10/27/2024· LANE DEPARTURE

  Vehicle disengaged lane keeping ADAS without warning multiple times. Sometimes a warning beep would occur, but often on turns it would suddenly disengage without a beep or any other warning method causing me to have to yank the wheel to complete the turn correctly and avoid running off the road. This has caused me to not trust the system and fight the lane keeping feature just in case it suddenly turns off and goes into the other lane before I have a chance to correct the steering.

• 10/25/2025· ELECTRICAL SYSTEM

  12 volt battery dead. Interior lights don't come on. Vehicle won't start. 1. 1/8/24: orange 12V light coming on repeatedly, meaning battery not charging. Dealer, Hyundai of Cool Springs, found battery would not hold charge. Replaced battery. Afterwards, orange light still came on sometimes, but dealer advised to ignore it. 2. NHTSA recall for ICCU software problem affecting battery charging, Hyundai Recall 257/021G. Dealer fixed problem 3/28/24, 41D043R0 .4. Afterwards, orange light still came on sometimes, but dealer advised to ignore it. 3. Hyundai recall #9B5 of 8/1/24, software problem in VCMS affecting battery charging. Dealer, Hyundai of Cool Springs, updated VCMS 40D097R0 .3 on 9/10/24 Afterwards, orange light still came on sometimes, but dealer advised to ignore it. 4. NHTSA Recall 24V-868 of 11/18/24, ICCU causing battery not to charge. Dealer, Hyundai of Cool Springs, updated VCU and ICCU, 40D229R0 .7 and 41D225R0 .4 on 1/23/25. Afterwards, orange light still came on sometimes, but dealer advised to ignore it.

• 10/22/2024· TIRES

  There seems to be a wide spread issue with the foam on the interior of Ionic 5 tires, Michelin 235/55/R 19. The foam dislodges from the interior of the tire and causes severe vibrations when driving at over 60 mph. The issue causes the tires to be unbalanced and can cause damage to the car. Wondering why Michelin doesn't address this issue and issue a fix other than stripping the tires of foam. My Hyundai dealer told me this is an on going issue and they have received no guidance from Michelin or Hyundai.

• 10/20/2025· POWER TRAIN,ELECTRICAL SYSTEM,ENGINE

  ICCU Failure — Severe Safety Risk and Repeated Incident The ICCU in my Hyundai has failed twice. Both times, the car suddenly and completely lost power while I was driving — no warning lights, no gradual slowdown, just total loss of control. This created an extremely dangerous situation that put me, my passengers, and everyone around us at risk. When the ICCU fails, the vehicle shuts down instantly and becomes completely inoperable. During the most recent incident, I spent more than eight hours on the phone with Hyundai attempting to arrange a tow. When the tow truck finally arrived, the driver instructed me to shift the car into neutral. The moment I did, the car died again and became stuck in neutral, preventing the driver from towing it. He then left, unable to assist, leaving my disabled vehicle parked on a public road — on a hill — where it posed a further safety hazard. Hyundai’s response to these failures has been temporary at best. This issue continues to reoccur, making the vehicle effectively unsafe to drive at all times.

• 10/20/2023· POWER TRAIN,FORWARD COLLISION AVOIDANCE

  Driving on freeway when adaptive cruise control turns off and had a sudden complete loss of acceleration, we had steering and brakes only. Sudden reduction of car speed in traffic could cause accident. Has only happened once in 20k miles. (no acceleration) Adaptive cruise control shuts off for no reason, but dealer couldn't replicate. In recent 8k trip we photographed warning on dash 17 + times after shut down. Dealer couldn't find any saved trouble codes for this. No warnings prior to any occurrence only after, dash turned off on acceleration loss.

• 10/18/2024· ELECTRICAL SYSTEM

  The contact owns a 2023 Hyundai Ioniq 5. The contact stated while driving at an undisclosed speed, the vehicle lost motive power with several unknown warning lights illuminated. The vehicle was towed to the dealer. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and a case was opened. The approximate failure mileage was 6,500. The VIN was not available.

• 10/16/2025· STEERING,POWER TRAIN,VEHICLE SPEED CONTROL

  NHTSA Vehicle Safety Complaint Vehicle Information: Year: 2023 Make: Hyundai Model: Ioniq 5 VIN: [XXX] Mileage: Over 137,000 miles 15 States Driven: AZ, TX, GA, CA, MI (with damage here primarily) Complaint: My 2023 Hyundai Ioniq 5 has experienced persistent and severe safety failures since delivery in January 2023, including: Complete power and control loss at highway speeds Repeated BMS/12V failures (even at 30% state of charge) Nonworking rear brake lights at night for over one year False-alarming and nonfunctional parking sensors Interior wear faster than normal; more These failures have created life-threatening hazards for me and my children, who regularly ride in the vehicle. The vehicle is under an active federal safety recall, which under 49 U.S.C. § 30118–30120 requires dealers and manufacturers to repair recalled vehicles promptly, without regard to profitability or cost. Despite repeated written requests, Pedder Hyundai (Poway, CA) refused to perform recall repairs, obstructed resolution, blocked corporate contact, and threatened to tow the vehicle illegally at my expense within 48 hours, demonstrating reckless disregard for consumer safety and federal law. A police report documenting criminal endangerment, conversion, and aggravated consumer endangerment is pending, and the lender of the vehicle has been notified of breach of contract. These issues appear systemic, affecting multiple vehicles of this model, and have resulted in: Frequent, unexpected towing with surprise expenses and downtime Significant risk of injury or death due to power/control loss Repeated failures despite warranty and recall obligations I request NHTSA investigate immediately, ensure recall repairs are completed promptly, and take any action necessary to protect public safety. Available case file including Dealer correspondence showing obstruction refusal threats to ignore California and federal law INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

• 10/16/2023· POWER TRAIN,ENGINE

  See uploaded photos and document.

• 10/14/2025· ELECTRICAL SYSTEM,AIR BAGS

  Airbag wire under driver seat drags on ground

• 10/12/2025· ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM

  Car won't charge on Level 1 charging; it popped the GFCI in my garage and now no longer charges on level 1 (regular slow AC charging).

• 10/11/2024· ELECTRICAL SYSTEM

  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.

• 10/09/2025· ELECTRICAL SYSTEM

  The car stopped trickle charging even though it wasn't at 100%. When I turned it on, there was a warning message indicating an electrical failure. I called the dealership and they said it was unsafe to drive it the 2-3 miles to the dealership so it had to be towed. Once it was diagnosed, the dealership told me the ICCU had failed. This is a known defect in this car that for some reason has not been resolved with the previous recalls, and the replacement units that are installed are just as prone to failure as the original. It is expected that I will have the car back approximately one week after it was towed to the dealership.

• 10/08/2025· ELECTRICAL SYSTEM

  The ICCU, which is an electrical component that charges the 12 volt battery, failed. As a result the power drained completely and the car shut down. This is a safety issue because it happened while driving and my husband just barely had time to get the car over to the side of the road. It has also been know to happen to cars of this model while driving on a highway, which is obviously very dangerous. The problem has been confirmed by a dealer - Gary Rome Hyundai in Holyoke MA. They ordered us a new ICCU, which took about a month to get. Orders for the ICCU's are backed up because this problem has been happening to so many cars. And as the dealer reported, the problem has been known to happen to the same car multiple times, even after the ICCU is replaced. The vehicle was not inspected by the manufacturer, police, or insurance. It was towed to the dealership for repair. There were no warning messages until the battery started failing and it was only about a minute before the car shut down.