2026 Hyundai Ioniq 9 Owner Complaints

The contact owns a 2026 Hyundai Ioniq 9. The contact stated that while triggering the front driver’s side exterior door handle sensor, the auto-flush door handle mechanism retracted without anti-pinch detection while the contact’s fingers and the daughter's fingers were positioned between the handle and the door panel on two separate occasions. The dealer was notified of the failure. The failure mileage was approximately 8,000.

NHTSA ID

11766164

Incident

Apr 22, 2026

Mileage

8,000 mi

On XXX, I experienced a safety-related problem with a rear door on my 2026 Hyundai IONIQ 9. While the vehicle was parked, I attempted to open the rear door from inside the vehicle, but the door would not open. The child lock was believed to be OFF at the time. I attempted to operate the interior door handle, but the rear door remained locked and could not be opened from inside. This incident was directly witnessed by one of my coworkers, who was present when the problem occurred and can confirm what happened if additional information is required. I am concerned that an occupant could be unable to exit the vehicle in an emergency if this condition occurs again. A rear door that cannot be opened from inside could create a serious safety risk in situations involving a crash, fire, electrical malfunction, or other emergency requiring immediate evacuation. The vehicle and rear door locking system are available for inspection upon request. On XXX, I drove the vehicle to Glassman Hyundai in [XXX] because of this issue and a separate windshield wiper safety concern. The dealership did not accept the vehicle for a walk-in diagnosis that day. The earliest available service appointment was scheduled for XXX. The rear-door problem has not yet been reproduced or confirmed by a Hyundai technician, and no repair has been performed. I am not aware of any warning light or warning message related to the rear-door condition before or during the incident. I am submitting this complaint because the inability to open a rear door from inside the vehicle could prevent an occupant from exiting during an emergency, even though the door may operate normally at other times. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11763579

Incident

Sep 10, 2026

On XXX, while driving my 2026 Hyundai IONIQ 9, the front windshield wiper system completely stopped operating. I activated the windshield washer because the windshield was dirty. Washer fluid sprayed normally onto the windshield, but the front wipers did not move. I then tried AUTO, LOW, and HIGH settings, and none of them worked. This created a safety hazard because washer fluid remained on the windshield and reduced visibility while I was driving. I immediately pulled over and parked in a safe location. I tested the wipers again while parked, but they still did not operate. After arriving at my workplace, I tested them again and they remained inoperative. I recorded a video while the malfunction was occurring. The video clearly shows that the windshield wipers would not operate. The vehicle and wiper system are available for inspection upon request. I then turned the vehicle completely OFF for approximately five minutes. After restarting the vehicle, the windshield wipers began operating normally again without any repair. The failure has therefore not yet been reproduced by a dealer or confirmed by a service center. On XXX, I drove to Glassman Hyundai in Southfield, Michigan and requested an inspection as a walk-in. The dealer did not accept the vehicle for diagnosis that day and scheduled the earliest available service appointment for XXX. The vehicle has not yet been repaired. I did not observe any warning lights, warning messages, or other symptoms immediately before the windshield wiper failure. I am concerned that this intermittent failure could occur again while driving in rain or snow, resulting in sudden loss of forward visibility and creating a serious crash risk. The below is the link for the video. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11763577

Incident

Sep 11, 2026

When reaching speeds of approximately 55 to 60 mph, the car would begin to shake and the steering wheel would excessively begin shaking. You did not feel like you had great control of the car. The front two tires required replacing due to the foam being detached/mangled within the tires. The dealership put the new tires onto the back of the car and rotated the original back tires to the front of the car as part of the repair/replacement.

NHTSA ID

11760740

Incident

Aug 26, 2026

We bought two of these car seats and the base on account we liked the feature that the car seat can rotate in the base... This car seat is UNUSUALLY UPRIGHT on its own and I believe the base insert makes it worse. I am a first time mom and I didn't realize how bad the ergonomics of this car seat are until recently, but my baby absolutely HATES the car now because she associates it with how uncomfortable this car seat is. I cannot stress the emotional distress this car seat has caused me and my baby. Any product like this should not be on the market

NHTSA ID

11758215

Incident

Apr 25, 2026

I am reporting serious repeated safety failures with my 2026 Hyundai IONIQ 9 involving unintended emergency braking and sudden loss of propulsion. While traveling approximately 70–75 mph northbound on I-15, the vehicle suddenly displayed an emergency braking warning and aggressively slowed despite no apparent obstacle or traffic condition requiring emergency braking. Before I could regain control, the vehicle came to a complete stop in active freeway traffic with vehicles around and behind me, creating an extreme risk of a high-speed rear-end collision. Something similar has happened on two other occasions. On a separate occasion while traveling on I-40, the vehicle again unexpectedly initiated emergency braking. I was able to disengage adaptive cruise control and regain control before the vehicle came to a complete stop. The vehicle has also experienced two separate loss-of-propulsion incidents. During one, the vehicle suddenly limited its maximum speed to approximately 22 mph and would not accelerate normally for approximately four miles before returning to normal operation without explanation. During another incident, the vehicle suddenly would not exceed approximately 40 mph. I safely pulled over, but once stopped the vehicle would not accelerate from 0 mph, leaving me unable to re-enter traffic. Normal operation returned only after shutting the vehicle off and restarting it. The Hyundai dealership has inspected the vehicle 3 times and has had it for more than 3 weeks, but states it cannot replicate the conditions. These failures are intermittent but have occurred repeatedly and involve critical braking and propulsion systems. I am concerned another event could cause serious injury or death, particularly if the vehicle brakes unexpectedly at freeway speed or loses propulsion while merging or crossing traffic. I am requesting NHTSA investigate this potential safety defect.

NHTSA ID

11757960

Incident

Aug 4, 2026

On XXX I had two warnings pop up on the car to check electric vehicle system while driving. The car was still driving fine, so I took it into the dealer (ALM Hyundai in [XXX]) within a few days to have general maintenance and for the DTCs to be reviewed. The EV tech was 2 weeks out, so they just briefly reviewed the code and said it was safe to drive. Everything was fine until XXX. I fully charged the vehicle overnight on XXX. Around 11:30 a.m. on XXX I went to drive the car. This was the 3rd time I had driven it since charging it and was about 2 minutes into the drive when the check electric vehicle system light came on again and the car started losing power and accelerating on its own. It cycled this way at a few times and I quickly pulled over into a parking lot as the car was crawling. I turned the car off and back on and returned to my office. I was not able to get it towed to the Hyundai dealership until XXX. When I turned the car on in the morning of XXX, the light had disappeared and I never received an alert within the app that the code appeared in the car. Thankfully my young children were not in the car with me at the time and I was not on a highway or this could have been a serious accident. The car is still within diagnostics, but the last update that I received on XXX the service department stated that they had not been able to duplicate the issue or code. When I dropped the car off, they told me that they could not repair it if they could not duplicate the code. If they cannot find an issue and the fact that the car did not record the code makes this a serious safety hazard not only to anyone driving the vehicle, but other vehicles on the around driving around it. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11757195

Incident

Aug 11, 2026

Driving on a public road with a 50 phone speed limit, I received an error message on my dash stating electrical failure, and then the car shut down and began to coast, I had use all my strength to turn the car towards the curb and coasted to a stop. I received an error message from multiple components and then the dash went blank.

NHTSA ID

11756108

Incident

Aug 10, 2026

On 8/3/26 my Ioniq 9 had a warning message to Check the Electrical System, but provided no additional information. I was able to drive the car home, anticipating that I be able to take it in to the Hyundai dealer where i purchased the vehicle. It should be noted that the car went into limp mode (max 25 mph) for the final six miles to my home. I researched the issue on line and determined that it was possible to get the car to the dealer based upon the experience of other Hyundai owners. Note: There was no information in Hyundai documentation as to the range i could expect once receiving the error message. The morning that I took the car to the dealer, the car started normally but within 1/2 mile it went into limp mode again and within 100 feet went into 'turtle mode" 2-3 mph and came to an abrupt stop. I was at the side of the road and put the hazardous flashers on (which remained on for only a matter of minutes before going dead). The vehicle was then totally dead with no emergency flashers on a busy street). I had the vehicle towed to the dealer which was returned later in the day noting that "the 12 v battery had been recharged and subjected to load and GDS diagnostics, both passed. ICCU inspection confirmed no faults, no parasitic current draw detected, ECR reset performed". Got the car home and the very next morning received a code indicating that electrical service was required. Took the car back into the dealer and have just been informed that the ICCU is being replaced. Safety concerns: lack of documentation and information from mfr, a dead vehicle on a well-travelled road with no functioning safety hazard flashers. Luckily the event occurred during daylight hours and not during the nighttime hours.

NHTSA ID

11755299

Incident

Aug 3, 2026

I am submitting this complaint regarding a suspected manufacturing defect involving an original equipment Hankook iON evo AS tire installed on my 2026 Hyundai IONIQ 9. At approximately 8,000 miles, and with the vehicle only six months old, the tire developed a severe vibration that increased with vehicle speed, becoming most noticeable above approximately 55 mph. The vibration became progressively worse, raising concerns about the safe operation of the vehicle. A Hyundai dealership inspected the vehicle and determined that the sound-deadening foam attached to the inside of the tire had separated from the tire carcass. The detached foam caused the tire to become significantly out of balance. The tire required replacement. This was not the result of a road hazard, impact, puncture, or normal tire wear. The tire had been used under normal driving conditions and had accumulated only approximately 8,000 miles. Because the vehicle could not be safely driven until repaired, I was required to rent another vehicle while awaiting the repair. Hyundai denied reimbursement for the rental expense because tires are covered under the tire manufacturer's warranty rather than the vehicle warranty. I am concerned that separation of the internal foam on original equipment Hankook iON evo AS tires may represent a manufacturing defect that could affect other vehicles equipped with these tires. A severe imbalance at highway speeds could create a significant safety hazard by impairing vehicle control or distracting the driver. I respectfully request that NHTSA review this issue and determine whether similar failures have been reported and whether further investigation is warranted.

NHTSA ID

11752973

Incident

Jun 19, 2026

An Integrated Charging Control Unit (ICCU) failure halts the vehicle’s ability to charge and power the 12-volt battery. When it fails, the car can no longer keep the 12V battery charged. This drains the 12V system, potentially causing a sudden loss of motive power while driving or a "bricked" car that won't start. The presents a safety problem because it happened while I was driving and the car slowed down to a halt in a high speed traffic area. This is a well known issue with Hyundais and Kias that share the same EV platform. The car was towed to the dealer on 7/21/2026 and was confirmed as an ICCU issue after diagnostics.

NHTSA ID

11751977

Incident

Jul 20, 2026

ICCU failure. Warning lights came on in the dash and diagnostic codes were available in my Hyundai app. My family and I had just gotten back from a road trip and if the ICCU would have failed while we were on the trip we would have been stranded and it would have been during the heat wave. The vehicle is currently in the service department waiting for the part to come in.

NHTSA ID

11750459

Incident

Jul 13, 2026

My 2026 Hyundai Ioniq 9 (Performance Calligraphy AWD), leased new in late April 2026 from Team Hyundai of Bend, OR, suffered an Integrated Charging Control Unit (ICCU) failure at approximately 1500 miles in late June 2026, roughly two months into ownership. The failure progressed over several days. First, at a ChargePoint Level 2 (AC) station, the vehicle repeatedly displayed "charging started" every few minutes in a continuous start/stop/retry loop. Within days, AC charging failed completely: the vehicle reported "charging unsuccessful" on two separate EVSEs (a hardwired Level 2 charger and the Hyundai portable charger) across two different circuits. DC fast charging still worked. No other dashboard warnings were displayed. The dealer diagnosed a failed ICCU and replaced the unit. The vehicle was out of service for approximately 2 days thanks to the dealership's great service team. Luckily we were not out on a road trip which we have planned in the next 2 weeks which would have left us stranded with a newborn. This is a documented, ongoing safety defect across Hyundai, Kia, and Genesis E-GMP vehicles. ICCU failure can cause the 12-volt battery to stop charging, leading to reduced power or sudden loss of motive power while driving, which creates a crash risk. NHTSA previously opened an Office of Defects Investigation into this issue, and Hyundai issued recalls 24V204 and 24V868 to address it. What makes this report significant: the 2026 Ioniq 9 uses the second-generation ICCU that Hyundai represents as containing the corrective hardware changes. My failure occurred on this redesigned part, on a vehicle barely two months old, which indicates the underlying defect has not been resolved in current-production vehicles. This is the family's primary vehicle and we have a newborn at home, so the loss of use was a significant hardship. I am filing so this second-generation ICCU failure is on the record and counts toward any future investigation or recall action.

NHTSA ID

11746752

Incident

Jun 24, 2026

The motorized flush door handles lack an automatic anti-pinch resistance sensor when retracting. If an object, hand, or child’s finger is caught inside the door handle while the vehicle locks, the motor continues to force the handle shut. This creates a severe crushing and entrapment hazard. This is available for inspection upon request. My child’s finger got caught in the door handle while the vehicle was locking. There have also been several near miss incidents. The problem has been reported to my local dealership where I purchased the vehicle, but they do not appear to take the issue seriously. The issue has not been inspected by the manufacturer, police, insurance representatives, or others. There are no warning lights or messages due to this issue.

NHTSA ID

11745506

Incident

Jun 7, 2026

I was driving at 35 mph speed on a straight road and the car automatically activated emergency steering and pushed towards right I had to jerk the steering towards left to prevent any accidents. No adverse event occurred however this was unnerving experience.

NHTSA ID

11745480

Incident

Jun 21, 2026

On XXX, at approximately 2:20 PM, while driving about 30 mph on a suburban road in [XXX], a red battery warning light appeared on the main instrument cluster. I pulled over and contacted Hyundai support. When I attempted to resume driving, the vehicle accelerated sluggishly with noticeably reduced power. I pulled over a second time and parked with the vehicle still powered on. While I was on the phone with Hyundai roadside assistance, a red ‘Stop vehicle and check power supply’ warning message appeared on the dash, and the vehicle completely lost power several minutes later, becoming inoperable. It had to be towed to a Hyundai dealership. Weather was clear and road conditions were normal. There was no crash, fire, or injury. The vehicle had approximately 3,770 miles at the time of failure. As of this report, the dealer has not yet completed diagnosis. The symptoms are consistent with the integrated charging control unit (ICCU) failure pattern widely reported in Hyundai EVs, but this has not yet been confirmed. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11743940

Incident

Jun 13, 2026

On XXX, my 2025 Hyundai Ioniq 9 displayed a battery fault warning (DTC P1AAF00). I was instructed by Hyundai to bring the vehicle to a dealership immediately as other Ioniq 9 owners had experienced sudden and complete loss of motive power during highway operation. The vehicle has been at Pacifico Hyundai in [XXX] since that date. I was initially told the battery control module required replacement with only 7 units available nationwide. On May 5 I was informed via text that the entire high voltage battery pack requires replacement with no release date provided. The vehicle has been out of service for 48 days with no repair timeline. This fault presents a serious safety risk as sudden loss of power at highway speeds creates an immediate collision hazard for the driver and surrounding vehicles. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11741955

Incident

Apr 16, 2026

The Integrated Charging Control Unit (ICCU) on this vehicle produces loud whirring noises when charging at 80% or above. This has been documented in writing to the service department. The ICCU defect is a known systemic issue across the Hyundai and Kia EV platform. The vehicle is currently scheduled to return to the dealer for this and other defects. This is the second major service visit on a vehicle leased in March 2026 that was already out of service 28 consecutive days for a sunroof failure.

NHTSA ID

11741651

Incident

May 22, 2026

On May 14, 2026, while traveling at highway speed in a clear passing lane with no obstacles present, the autonomous emergency braking system activated without cause and brought the vehicle to a complete stop. A following vehicle nearly rear-ended me. I recorded a voice memo immediately after the incident. A third-party crash detection application on my phone independently logged the hard stop event. A second phantom braking incident has since occurred. The vehicle is a 2026 IONIQ 9 Calligraphy leased in March 2026. This is the second major defect event on this vehicle, which was also out of service 28 consecutive days for a sunroof failure earlier this year. I am aware of ICCU-related systemic defects documented across the Hyundai and Kia EV platform and believe this may be connected.

NHTSA ID

11741650

Incident

May 14, 2026

I was driving on the highway at 70 mph approximately with my young daughter in the backseat. All of a sudden, the front display on my Hyundai Ioniq 9 went completely black and said "no signal." I lost all dashboard information about my speed, gas gauge, horsepower etc. The only thing I could do was see how fast I was going because I was on google maps and my audiovisual screen in the center was still working. I drove 15 min with this to the dealership. The signal never came back. I had the car at the Planet Hyundai for 14 days. They said nothing was wrong and that I should come back when it happens again. It was TERRIFYING having no signal and wondering if my car was going to stop in the middle of the highway. The dealer said that Hyundai would not do anything about it unless it was recreated even though I had pictures of it. What a horrible experience and I am terrified to drive the car now.

NHTSA ID

11739235

Incident

Apr 23, 2026

Was driving down the highway when Check: electric vehicle system warning came on and car slowed suddenly and wouldnt go past 41MPH. Within a min, the car slowed down further and just as I was pulling on the shoulder. Car didnt have power to move after.

NHTSA ID

11736905

Incident

May 9, 2026

On April 23, 2026, while driving my 2026 Hyundai Ioniq 9 , the Automatic Emergency Braking system completely failed to detect an oncoming hazard. The system did not alert me, did not activate, and did not apply emergency braking. I nearly collided with another vehicle as a direct result of this failure. The vehicle has a persistent diagnostic trouble code C28AB87 — CAN time-out for the front radar unit — which disables critical Advanced Driver Assistance Systems including Automatic Emergency Braking, collision avoidance, and Smart/Adaptive Cruise Control. This is the same defect that has been present since early in my lease. The vehicle has been presented for repair at two different Hyundai dealerships on three separate occasions: Attempt 1 — Oxmoor Hyundai, [XXX] , March 19-20, 2026. Defect diagnosed, unable to repair. Attempt 2 — Oxmoor Hyundai, [XXX] , April 1-17, 2026. Front radar unit replaced. Defect remained. Attempt 3 — [XXX] Hyundai, [XXX] , April 23, 2026 to present. Suspected bad connector, part ordered. Vehicle still at dealership. Cumulative days out of service: 24 days and continuing for the same safety defect. I have formally demanded a buyback from Hyundai Motor America under Ohio Lemon Law ORC 1345.72. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11735039

Incident

Apr 23, 2026

Vehicle was operating perfect then got alert indicating electrical system fault but vehicle still drove (was just 2 miles from home ) but then alarms sounded and just able to pull off road before vehicle died. Checked and see code DTC PIA9096 and car was inoperable after. Towed to dealer for replacement of ICCU module. They acknowledged they have seen this before. I was on a local road, but if this happened on a highway, would have been more hazardous!

NHTSA ID

11731046

Incident

Apr 13, 2026

Failure of the ICCU during normal driving conditions. The vehicle was controllable, and driver was able to bring the vehicle to a safe location as vehicle performance deteriorated. The failure left the driver and passenger without power during a storm in an unfamiliar area. After about 45 minutes of waiting for roadside assistance, the vehicle lost all auxiliary power and no functions were available (including lights and door lock controls). Vehicle was towed to a local dealership, where issue was diagnosed and part has been replaced. The failure was not preceded by any significant event. Warnings present on the driver's information panel while driving.

NHTSA ID

11730311

Incident

Apr 1, 2026

Suspected ICCU failure. Progressed rapidly to car being immobile. Known issue not being addressed by Hyundai.

NHTSA ID

11726175

Incident

Mar 22, 2026