Hyundai Ioniq 6 Reliability by YearBest & worst years, problems & recalls — NHTSA data

Vehicle steering wheel was off-center and the vehicle wandered whenever the road changed camber or had rough sections. The vehicle was purchased used from Carvana,. I took it in for 4-wheel alignment and the tech reported that "All adjustment hardware at rear were pretty loose", and stated that it probably left the factory this way as he saw no evidence of prior adjustments. The left rear tire is badly worn on the outside and he recommended immediate replacement, which is awaiting warranty claim processing. Possible safety issues: Rear tire blowout, rear suspension alignment failure with loss of control.

ICCU failed. The car suddenly decelerated from 40mph to 25mph or less with no warning. The ICCU is confirmed to be an issue for Hyundai. I had the software update to fix the problem in 2025. It is currently at the dealership in Fort Mill, SC. DTC error code shows it as an ICCU failure. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? There were no warning lamps to until the failure occurred.

After several days of below freezing temps, started car after work and received "check electrical systems" warning. Couldn't drive above 15-25 mph. Eventually led to total shutdown, could not start, lock/unlock doors, etc. Had to tow to dealer which they eventually deemed the ICCU to be at fault. 12v battery was dead and new battery they put in to test died it sounds like as well. Or they "recreated the problem" was their words after trying to claim it was only a bad 12v battery.

Driving 65 on the highway, the ICCU popped and died and the car immediately went into slow mode and decreased to 20mph in traffic in the snow. It displayed a message to pull over immediately and check the power system.

The morning after a successful level 2 charge (from 35% to 80%), the ICCU fuse blew, resulting in no power to the car. I had to have it towed to have it fixed (both the fuse and ICCU were replaced under warranty). The car had 20,013 miles when the fuse blew and I had both safety recalls (software updates) addressed when they came out. I thought the updates were to prevent this from happening. Fortunately I was in my garage and not on the road; however, just the evening before, I was on I-95 for over an hour and glad it did not occur then. So now I'm fearful that it could happen again when far from home.

When driving recently, the car suddenly began showing a warning message “check electrical system” and would not go beyond 25mph. I was on the way home but still far, and had to turn on my hazard lights to alert other drivers. Eventually the car escalated the warning to “pull the vehicle over” and implied that the main battery was having an issue. I had to have th car towed to a dealer (closest is 10 miles) who eventually diagnosed the issue as a blown ICCU. My understanding is this is a critical component to the charging infrastructure and must be fully operational for the car to safely drive. Hyundai repaired the part and I had the car back in a few days, but I could get no assurances on what happened or whether or not it would occur again. The car has 14,000 Miles in the Washington DC area. It seems incredibly unsafe that this component could blow at any time. I also understand there are many other owners with this exact issue.

I had the ICCU unit recall taken care of on my car. While driving yesterday evening, I had a complete power failure. There were warning lights on the dashboard so I slowed down until it finally totally stopped. The warning lights said check electrical system and a yellow turtle light came on. While waiting for the tow truck all electric stopped including the flashers. It was dark, during rush hour and 10 degrees outside. I was left stranded, blocking traffic and with no heat. People were honking their horns and fighting to get around me. The street became one lane. It was very dangerous for me, I was a sitting duck. It also became dangerous for pedestrians trying to walk while cars squeezed around my car. Again, all of this happened in the dark in 10 degree weather. I waited all day to get a diagnosis from the dealer but they were too busy. I was not given a loaner car and have been stranded at home and lost a day of work. I had to have my car towed home last night and waited for a tow again to take it to the dealership. I may lose another day of work tomorrow.

ICCU failure. 5 minutes into my drive to work, the car slowed down, dashboard said electric failure and then died. It had to be towed to the dealership where it took a week to get ICCU replaced. Apparently a lot of Ioniq owners are having this problem. No warning signs, the car just dies. Car has 26,000 miles.

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.

ICCU SHORTED AND BLEW FUSE AFTER CHARGING. Shut off driving down the road.

The ICCU failed on my vehicle after 25,000 miles on a 2024 model year car. Driving on a cold and wet night, after pulling away from a stop sign, we heard a large POP and then dashboard lights indicating an electrical system problem. Apparently the sound was a fuse blowing, and then the car went into limp mode. We were able to drive at approximately 24 mph for about 5 minutes before the car told us to stop immediately. We had to get the car towed to a dealership the next day, after getting it towed to our house first. If this had happened on a freeway it would have been a very dangerous situation. We were told it was a just a "bad part". But there had been a previous recall for software update, and this part still blew up. There is nothing we are told that can be done and some of the units are just bad. Hyundai should find the ROOT CAUSE of this issue, and fix it!

The power system failure warning came on as I was driving up on an intersection. WhenI released the accelerator because I was in i-pedal mode (one pedal driving), the cars braking system did not activate. Consequently, I ran the red light. The car power was reduced, and I was able to pull into the parking lot of a strip mall as a police vehicle pulled behind me. After explaining our situation and receiving my traffic ticket, the officer asked me to move the car out of the driveway, but I was unable to shift the car into drive given the power warnings that were flashing on the display. The officer asked if I needed a tow and I let him know I would use the brand’s Roadside Assistance for my vehicle. I turned the car off and the officer left. I waited about 10 minutes and I tried turning on the car again and was able to shift into drive and get out of the driveway and into a parking space. However, the car operated in low power mode and could only travel about 3 miles an hour. The tow truck driver had to jump the 12 V battery which was completely depleted in order to turn on the vehicle to move it. At Hyundai Service center, the car turned off abruptly as he was trying to move it into a parking spot. Despite supposedly having been addressed in a recall, the failure of the vehicle’s power system due to the ICCU put me in my family at risk while actively driving on a road with traffic.

Car horn stopped worked a year and a half in

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.