2026 Hyundai Ioniq 9 problems

Filed Nov 3, 2026 · Fuel system, Transmission · MS

The rear motor failed while driving on the highway/interstate at 70 mph.

Filed Oct 29, 2026 · Seats · MI · 1 injury

While the vehicle was stationary, the driver pressed a saved profile button on the Integrated Memory System (IMS) on the door panel to adjust the driver's seat. A passenger was seated directly behind the driver in the second row. Upon pressing the memory button, the motorized driver's seat began moving backward toward the saved position. Whether due to a system malfunction or a lack of built-in detection features, the vehicle did not interrupt the motorized movement upon encountering an obstruction. The seat forcefully and continuously compressed backward, squeezing and trapping the second-row passenger's legs. The seat did not stop on its own and only ceased moving when it completely jammed against the passenger, causing minor physical injury to their legs. This constitutes a severe mechanical/software defect and a critical occupant crush hazard.

Filed Sep 30, 2026 · CA

The door sensor on driver side does not operate, when touched does not open or close. However, the door sensor on passenger side works well. Bought car and noticed the defect in one week of ownership, after two months of waiting and diagnosing by dealership, they still were unable to find the solution.

Filed Sep 22, 2026 · Body · 8,000 miles · OR

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.

Filed Sep 11, 2026 · 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)

Filed Sep 11, 2026 · Visibility · MI

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)

Filed Aug 30, 2026 · Tires · CA

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.

Filed Aug 20, 2026 · CO

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

Filed Aug 19, 2026 · Driver assistance, Fuel system · CA

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 the federal safety agency investigate this potential safety defect.

Filed Aug 15, 2026 · Fuel system · GA

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)