Hyundai Ioniq 5 key fob problems

Filed Jul 7, 2026 · Acceleration, Brakes · CA

1. Sudden Unintended Acceleration On two (2) separate occasions, after coming to a complete stop at a red light with foot on the brake pedal, the vehicle suddenly lurched forward on its own. 2. Brake Pedal Malfunction On more than ten (10) occasions, when attempting to stop at a light, the brake pedal briefly behaves like the accelerator for approximately 1–2 seconds. Driver has to release the brake and press it again to restore normal braking function. 3. Doors Unlocking/Opening on Their Own On more than one hundred (100) occasions, approximately 10 minutes after parking — with no key fob or phone nearby — a door opens on its own. Confirmed via mobile app notification and visual confirmation from a distance each time. 4. Apple CarPlay Connectivity Issues CarPlay frequently fails to connect. During phone calls specifically, the connection drops in and out intermittently. 5. Sticky Residue on Door Handles A sticky, adhesive-like residue is present on the interior passenger door grab handle and rear door handles. Residue does not clean off and transfers to hands on every use.

Filed Jul 7, 2026 · Acceleration, Brakes · CA

1. Sudden Unintended Acceleration On two (2) separate occasions, after coming to a complete stop at a red light with foot on the brake pedal, the vehicle suddenly lurched forward on its own. 2. Brake Pedal Malfunction On more than ten (10) occasions, when attempting to stop at a light, the brake pedal briefly behaves like the accelerator for approximately 1–2 seconds. Driver has to release the brake and press it again to restore normal braking function. 3. Doors Unlocking/Opening on Their Own On more than one hundred (100) occasions, approximately 10 minutes after parking — with no key fob or phone nearby — a door opens on its own. Confirmed via mobile app notification and visual confirmation from a distance each time. 4. Apple CarPlay Connectivity Issues CarPlay frequently fails to connect. During phone calls specifically, the connection drops in and out intermittently. 5. Sticky Residue on Door Handles A sticky, adhesive-like residue is present on the interior passenger door grab handle and rear door handles. Residue does not clean off and transfers to hands on every use.

Filed May 30, 2026 · Electrical, Fuel system · MA

Vehicle was parked in closed garage overnight. In the morning I tried to start the car and it was unresponsive. key fobs, digital keys, NFC cards none of them were able to open the car. Used a physical key to open the door, and then tried to turn the car on, nothing worked all screens remained black and car was unresponsive. AAA confirmed that the 12V battery was fully dead. When they jumped the vehicle we heard a pop in the car, which is a known ICCU failure indication. The car still turned on and was drivable. I got it to the dealership safely and they confirmed that the 12V battery was fully dead and car only turns in if jumped. They also confirmed that the ICCU had a failure as well and they are going to need to replace the entire battery pack/ICCU assembly.

Filed Mar 4, 2026 · Electrical · 160 miles · OR

The contact owns a 2026 Hyundai Ioniq 5. The contact stated that while charging the vehicle at the workplace, the vehicle started flashing a message "Charging was Unsuccessful". The contact was able to drive the vehicle to the residence; however, the door locks were making clicking sounds. The contact stated that the vehicle was parked in the driveway and the key fob failed to unlock or lock the doors. The contact called the local dealer, who advised her not to drive the vehicle. The vehicle was towed by the dealer to be diagnosed, and the dealer informed the contact that the Integrated Charging Control Unit (ICCU) had failed and needed to be replaced. The vehicle was not yet repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 160.

Filed Jan 22, 2026 · Brakes · CA

I am writing to report a serious safety incident involving my 2022 Hyundai Ioniq 5 and to request a thorough investigation and guidance on next steps. On Jan. 3, 2026, at approximately 6:15 p.m. on a snowy day, we parked our car in the driveway of a weekend rental home near Lake Tahoe, CA. The driveway had a slight slope toward the house, and we backed the car down the driveway with the rear of the car facing the house. My husband turned off the car, then all five occupants exited the vehicle, closed the doors, and began unloading items from the trunk. The car began rolling backwards toward us and the house. It only stopped after pinning my husband into a snowbank created by a snowplow. The other three adults and our [XXX] niece narrowly avoided being struck. While pinned behind the vehicle, my husband had to dig out some snow to reach into his pants pocket and retrieve the key fob. I then moved the car forward a few feet to free him. Although he was pinned in the snow, my husband was (thankfully) not seriously injured. After freeing my husband, I put the car in Park and turned it off. In this model, the parking brake engages automatically; there is no separate parking brake button or lever. A few minutes later, without anyone in or near the vehicle, the car again rolled backwards down the driveway into the same snowbank. Tracks in the snow clearly indicate that the wheels rotated and the car rolled; it was not sliding on ice with the brakes applied. In other words, the parking brake and/or Park mechanism failed to hold the vehicle in place in sub freezing, snowy conditions. The temperature at this location and time was in the mid 20s °F. After returning home from our trip, we took the car to our Hyundai service center, which has performed all maintenance since we purchased it in 2022. The service center performed all standard diagnostics but was unable to replicate the failure conditions. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Dec 11, 2025 · OR

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 the federal safety agency to review whether locking basic safety functions behind a paywall creates a safety defect that could put vehicle occupants at risk.

Filed Apr 7, 2024 · Acceleration, Electrical · AZ

I was driving 75mph on the freeway and I heard a pop and then the electrical warning system on the car lit up. I lost power to the car and was only able to accelerate minimally. There was a warning of low battery and the vehicle was going to lose power. I turned on my hazard lights and was able to get to the exit and was able to exit the freeway safely. Once the vehicle lost power I was unable to open the charger door, start the vehicle, use any of the key fob functions and had to jump the 12V battery, only to die immediately after. There is no pre-warning to this happening, it just shows the alert and the car loses all power. There are also problems with the vehicle after being plugged in to charge and it says "Charging Unsuccessful", or stops charging after a short period of time. It also will not charge to full capacity at home or the charging station. I receive no warning lights or messages about why the charge is not working. It took weeks to get the vehicle into the dealer, making it extremely unsafe to drive and the error has almost caused a major crash. My vehicle has been at the dealer and has not been diagnosed with any issues yet. The dealer has provided me with a rental vehicle...in which now I'm paying for gas. Reading through these other comments...who knows how long it will be to get my vehicle back, yet I'm still making my payments...this isn't

Filed Jan 12, 2024 · Electrical · WA

The Ioniq 5 has a serious problem with 12 volt battery drain. Three times, I have returned from vacation and found that the 12 v battery was completely dead. This is a huge issue if a consumer cannot rely on their vehicle to start in an emergency. I called a dealer in Renton, Washington about the issue and the technician responded, "This is a common issue in these types of vehicles." I am sorry, but that is not acceptable and is a vehicle defect. With electronic doors, you cannot get into the vehicle to jump start it, if the vehicle is locked, unless you can pull the manual key from the key fob and open it with the key. 12 v battery drain is killing the lifespan of the battery. Looking on the internet, other owners are complaining of the same issue. My vehicle sat for one week two times in December and I just returned form a two week vacation to find the battery completely dead. I only have 4484 miles on the vehicle and it is a 2023 car, so it is not an old battery. The car has a serious electrical defect.

Filed Oct 15, 2023 · Electrical · MA

We had charged the Ionique 5 to 90% and driven for short trips. We parked it then went to do some errands about an hour later. The dashboard warned that the 12 V battery was almost completely discharged and that I should start the car by placing the key fob next to the start button. I did that but it didn't start. I pushed the off button and then tried again and it refused to start and the dashboard flashed somewhat erratically. The battery then went completely dead. We called the emergency roadside assistance and they came within 30 minutes but the person who arrived said he knew nothing about electric cars and so we asked him to leave. Later we searched the internet and found others have had the 12 V batteries discharge. We also learned it could be charged with a portable charger. We called the dealer as it was now Sunday. One of the salesforce managers reassured us that is was OK to use regular car chargers on the Ionique 12 volt battery. Our neighbor helped us do this and it then started working. We followed the internet (a blogger's) instructions to go to the utility site and put it in the mode that would make sure the 12 Volt battery was drawing on the main powertrain to completely charge. We left the car on for 30 minutes and then it seemed to be working normally. We did some errands and it continued to work well. The safety risk is if this had happened on the highway and away from home. The car was recently taken in for the scheduled recall of ? something before this happened. There were no warnings or symptoms prior to this incident. There was several months ago an episode when I was driving that the power seemed to decrease and I was unable to accelerate and drove about 2 miles on mostly city streets at about 20 miles per hour. After I shut the car off and then my husband tried to start it the next day, it worked fine--that was the only other incident. I did not report that and it did not recur.

Filed Apr 20, 2023 · Electrical, Transmission · NJ

We've owned the car since new, just over one year. The car was performing well one day and my wife went to her evening work. When she returned to her car around 6pm, the car wouldn't respond to the key fob and the door wouldn't open. She was able to open it with a key, but the car wouldn't start. It's a fully electric car and NOTHING lit up or made a sound. The traction battery had ample charge, but she called Hyundai and the car needed a "jump" from a repair vehicle that was called out, much like an ICE car needs the occasional jump...we assumed an interior light was left on, but the car's app didn't inform either of us of any issue prior to this...the same exact scenario repeated itself about one week later and we had the car jumped again and brought to our dealer, Burns Hyundai in Marlton, NJ. They determined that "nothing was wrong" which made no sense to me. My wife picked up the car and approximately one week later, the exact same thing happened again. This time we dropped the car off at the dealer where it's been for nearly one month. With their customer service lacking and information not forthcoming, I had to go to the dealer myself to get some answers. It seems the computer was telling then some codes were coming through about the battery, but nothing more. It didn't need replacing and they couldn't replicate the problem over a period of weeks...There are MANY online reports of this car having 12V battery and ICCU issues. Our dealer has several Ioniq5s awaiting ICCU replacement for the same problem as my car, but they "can't get the part from Hyundai". While our car at times won't start, they aren't seeing that in their shop now, awaiting repairs on cars that apparently die when driving also with 12v battery problems. Our car is a lemon and we intend to retain counsel to assist us in its repair. https://www.theautopian.com/why-everyones-favorite-electric-car-keeps-stranding-its-owners/?fbclid=IwAR3yNgwVKtaGhGPd7HBz79tOV-UI1myLdmyrwDzcOJZfLarsG80b_6NJLpk