25 of the
185 complaints filed about the Hyundai Ioniq 6
are about the other systems —
14% of everything owners reported.
The worst model year for it is 2023.
Driving the car at 30 mph, the vehicle suddenly failed to accelerate while pressing on the gas pedal. I was forced to pull over as soon as possible to try to resolve the issue at hand. Thankfully, the breaks still worked and I was able to come to a full stop, turn off the car, and restart the car. There were no warning lamps/ messages that appeared before or after the time of the incident. (Incident occurred Aug 11) This is the second incident that my car's acceleration failed while in the middle of driving. Previously, this had happened while on the freeway during stop and go congestion (Oct 2025). This is a severe life-threatening safety concern as the failures have happened while the car is in motion during traffic. When I have taken the vehicle in for an inspection and diagnosis after the first incident, the Hyundai dealership was not able to reproduce the problem (Oct 2025) and therefore, could not provide any corrective services. I have not taken it in again for the second incident. The car is available for inspection upon request.
NHTSA complaint #11758386 — an unverified report by a vehicle owner.
What component or system failed or malfunctioned, and is it available for inspection upon request? The vehicle's cellular connectivity becomes 100% non-functioning until head unit reset. This occurs some days after the car is parked in an area without cell coverage and is then driving into cell coverage area, even directly under cell towers. It appears to give up trying to connect when parked out of range and never attempts to reconnect. until manually reset. How was your safety or the safety of others put at risk? Without in-vehicle connectivity, automated crash alerts / location information is unavailable. There's NO indication there's a problem unless certain information screens are visible, and only then, the indication is the lack of any connectivity signal level bars (a missing very small and dim icon) Has the problem been reproduced or confirmed by a dealer or independent service center? Yes via live phone assistance with Hyundai bluelink support. They suggested the manual reset and observed the re-establishment of connectivity. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Not yet. I had the car in for a recall, but the service department said there was nothing they could do until Bluelink provided a fix. There's no fix announced. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No, just the missing icon if you know where to look on certain screens.
NHTSA complaint #11743326 — an unverified report by a vehicle owner.
My 2023 Ioniq 6 is not charging as it has for 3 years. When charging to 100% my app States 347 and 382 miles. It should be 361 as stated by Hyundai. What happens if I drive under 45 mph after 5 miles the miles goes down to 303. It is not working as stated. It is not holding miles properly.
NHTSA complaint #11742584 — an unverified report by a vehicle owner.
Driving car at low rate of speed when ICCU unit blew. The car threw a check Electrical system and then went into limp not traveling over 35 mph. In a mile car gave another warning to pull over and stop driving. car was towed to Hyundai dealer
NHTSA complaint #11738918 — an unverified report by a vehicle owner.
My leased 2025 Hyundai Ioniq 6 experienced a sudden malfunction resulting in loss of vehicle operation. The vehicle has been at the dealership with delayed diagnosis and no clear repair timeline provided. This appears to be a safety-related defect involving the electric system. I am aware of multiple reports and recent news coverage describing similar failures in Hyundai/Kia electric vehicles related to ICCU (Integrated Charging Control Unit) defects, which can cause sudden battery discharge and loss of propulsion. Media reports indicate that this defect has affected numerous vehicles and, in some cases, repairs have taken more than a month due to part availability and diagnosis delays. My vehicle experienced similar symptoms, including loss of power / inability to operate normally, and the dealer has not been able to promptly resolve the issue. This appears to be a broader safety-related defect rather than an isolated incident.
NHTSA complaint #11719923 — an unverified report by a vehicle owner.
I TOOK POSSESSION OF THIS VEHICLE ON SEPT 1, 2025 SINCE DAY 1 THE BLUELINK APP STATES THAT THE CAR NEEDS SERVICE I SPOKE TO HYUANDI CUSTOMER SERVICE & THEIR ONLY RECOMMENDATION IS THAT I GO BACK TO THE DEAL / I SAID TO THEM JUST YESTERDAY (FEB 12, 2026) SO LET ME GET THIS STRAIGHT / AM I SUPPOSED TO GO BACK TO THE DEALERSHIP EVERY DAY I THINK A RECALL IS NEEDED TO SEE WHAT IS GOING ON WITH THESE HYUNDAI CARS MY ORIGINAL CASE # IS XXX
NHTSA complaint #11717725 — an unverified report by a vehicle owner.
this vehicle was delivered to me on Sept 1, 2025 / i have been back to the dealership a few times regarding the front windshield is totally scratched up this had to happen from the windshield wipers the issue is that when i drive into the sun the glare from all the scratches is annoying the second issue that hyundai cannot fix is that the app on the phone has stated since day 1 that the cars vehicle health needs attention / hyundai corporate response is that I should take it back to the deal EVERY DAY / i have no clue what is wrong with the car and if it is safe to drive hyundai corporate is washing their hands regarding both of these issues / they are doing the same thing now that they did to me in 2018 when they told me that I had to pay them to break a lease on a lemon law claim when they could not fix the 20+ issues that were wrong with my car i have case numbers if you want them
NHTSA complaint #11714275 — an unverified report by a vehicle owner.
Horn fuse has blown 4 times in 5000 miles leaving the vehicle unsafe to operate. Problem is reproduced and confirmed. First started in November 2025 and 4th fuse was placed January 2026.
NHTSA complaint #11713875 — an unverified report by a vehicle owner.
Two years into my lease. I used my turn signal as normal, heard a loud CRACK as I pushed it down to signal a left turn, and the turn signal started to sag inside of its compartment behind the steering wheel. I did not use more pressure than normal, and I have never had this issue with another car before. The turn signal BROKE with normal use. This is not covered by warranty and I was quoted $1400 repair by the dealership.
NHTSA complaint #11708854 — an unverified report by a vehicle owner.
The ICCU on my 2023 Hyundai Ioniq 6 failed on December 5, 2025 after 19,616 miles. Luckily, the car was parked in my driveway when this occurred. If the car was in motion when the ICCU failure occurred it would have been very dangerous. The car cannot be driven. The car's system shows Hyundai Diagnostic Trouble Code (DTC) P1A906. The problem has been confirmed by a dealer. A new ICCU has been ordered. The car is under warranty and the dealer provided a loaner car while my car is being repaired.
NHTSA complaint #11703829 — an unverified report by a vehicle owner.
The ICCU had a failure and fuse also blew; vehicle needs those parts replaced. After reading about ICCU recalls, my vehicle was not in the last recall. It affected 2023-2025 models I started up my car in morning and was about to reverse out of my driveway. I heard a pop near the rear of my vehicle and then saw a "Check Electric Vehicle System" warning and battery light indicator on my dashboard. I tried driving around for a couple of minutes around my area, the car would not accelerate over 20-25 mph. I returned home and looked up the issue. My Hyundai app showed a Diagnostic Code of DTC P1A9096, which is related to the ICCU. I already have my car at a local Hyundai dealership to get it repaired under warranty but if it wasn't, I can only imagine the price it would cost to get this repaired. There should be more recalls.
NHTSA complaint #11700722 — an unverified report by a vehicle owner.
I am reporting an odometer and title discrepancy involving a 2025 Hyundai Ioniq 6 (VIN: [XXX] ) purchased from Van Hyundai II LLC (Carrollton, TX) on January 6, 2025. The dealer issued two temporary tags with conflicting color entries and later reported the vehicle to the Texas DMV as having 57 miles at title assignment. However, the vehicle was involved in an accident on January 17, 2025, and the official Progressive Insurance repair estimate and Hyundai diagnostics (app data) both record approximately 535 miles at the time of loss. After the loss, the dealership and insurer (Progressive) processed a title transfer using the original Manufacturer’s Certificate of Origin (MCO), listing Progressive as buyer with $0 consideration and 57 miles. This resulted in a false odometer declaration on the title record and misrepresentation of ownership sequence. The matter is under review by the Texas Department of Motor Vehicles (Case #25-XXX) and other state agencies for related title and notary irregularities, but the mileage falsification falls under federal odometer regulations. I am submitting this to NHTSA to request review of potential violations under 49 U.S.C. §32705 (Disclosure of Mileage Upon Transfer) and 49 CFR §580.5–§580.8 (Odometer Disclosure Requirements). Supporting evidence, including the certified TxDMV title history, Progressive repair estimate, and Hyundai diagnostics.. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11695529 — an unverified report by a vehicle owner.
The horns quit working. I'm on two weeks now waiting for the dealer to get the parts in to fix it. According to what I saw online, this is an ongoing issue.
NHTSA complaint #11688982 — an unverified report by a vehicle owner.
INCIDENT ONE: On 3/20/25 about 5 minutes after starting Climate Control on my Ioniq 6, I cleaned snow off the car and started it. As I started backing out, there was a loud warning sound and red indicators around the aerial image of the car on the dashboard. I double checked my surroundings and found no obstructions, so I continued to back out. As I began to turn the car into the direction I needed to head down the street, the car abruptly stopped. I had to put the car back into Drive and pulled forward. I checked again for snow on the bumpers and found none, so I backed out again, this time successfully. When I reached the intersection and tried to turn, the car again abruptly stopped and automatically sounded the horn. The car stopped in the lane of oncoming traffic, but there were no cars approaching. Again I had to put the car back into Drive. I pulled over and took a cloth and glass cleaner to wipe down the cameras. After doing this, I was able to continue on my commute without seeing red lines around the image of the car and without being abruptly stopped when turning. The dealer was unable to reproduce the problem, which they attempted to do under different weather conditions from those on the morning of March 20th. INCIDENT TWO: On 4/7/25, driving on a four-lane highway, a car pulled in front of me without signaling. I tried to alert them to my presence by sounding the horn. The space in the center of the steering wheel (with the horn icon on it) produced no sound when pressed. This was alarming. Fortunately I was able to slow down, and I was not hit by a car from behind. Later. I tried the horn again several times with no sound produced. The dealer repaired the horns.
NHTSA complaint #11657368 — an unverified report by a vehicle owner.
March 21st at around 7:30 PM, I was driving on the highway when my panoramic sunroof suddenly exploded—or shattered—completely out of nowhere. It was a clear night, no rain or debris, and there were no cars directly in front of me. Nothing hit it—no rocks, no objects—just a loud bang, and the glass was gone. I’ve got photos of the damage (attached), and it’s clear this wasn’t caused by an external impact. The glass blew outward, which makes me think it’s a manufacturing defect or stress in the material. Thankfully, no one was hurt, but this is a major safety issue.
NHTSA complaint #11649911 — an unverified report by a vehicle owner.
The horn on my vehicle is defective after 16000 miles. I am available to take it in for an inspection. I was almost backed into and I had no way of alerting the other driver. This problem has not been reproduced by my local dealership but it has been at other national and international dealerships per forums. I am unsure if this component has been inspected by the manufacturer, police, insurance company, etc. This problem was random without warning which makes this even more of a safety concern since I had no clue this was defective until I actually had to use it.
NHTSA complaint #11647298 — an unverified report by a vehicle owner.
The ioniq 6 horn is a two (2) tone horn. First, one (1) of the tones went out (lower tone). Now, the horn completely doesn't work. Reading online, this is a common issue with the 2023 & 2024 ioniq 6. This is the same horn (car is the same platform) as the ioniq 5, and lots of forums online also have people posting about their horns going out and not working at all.
NHTSA complaint #11639560 — an unverified report by a vehicle owner.