Hyundai Ioniq 5 lane assist problems

Filed Nov 9, 2026 · Driver assistance · MA

The vehicle uses an in-cabin infrared camera to monitor driver vigilance. The camera has known limitations "seeing" the driver's eyes through certain glasses, including regular prescription glasses needed for driving. Because of this limitation, the system incorrectly believes that the driver is being inattentive and looking away from the road. Alarms are activated, and eventually the ADASs indicated (adaptive cruise control, lane keep assist) deactivate suddenly at highway speeds, putting the occupants of the vehicle as well as other vehicles at risk from distraction and the sudden slowdown and potential veering from the lane. Hyundai has known technical service bulletins about this issue but no remedies (telling drivers not to use their prescription glasses or to pick glasses based on their infrared light transmissibility is not a solution).

Filed Aug 24, 2026 · Driver assistance, Steering · NV

While driving on the freeway with adaptive cruise control and lane keeping assistance on heading east into the morning sun my car suddenly attempted to veer strongly to the left as I exited the shadow of an overpass. I was able to stop the lane assist because I had a firm two handed grip on the steering wheel. Even with the firm grip and attentive driving I nearly left my lane as the wheels suddenly and strongly jerked to the left.

Filed Aug 12, 2026 · Driver assistance · VA

When I use the adaptive cruise control and use the lane keeping assistance the system keeps giving me an error message that I'm not looking at the road. I believe this is a known problem and Hyundai pushed an software fix TSB 25-G1-16H in November 2025. My car appears to have the update but still repeatedly gives me the same error message. It's very distracting and since the error message flashes on dash where you usually see the camera monitoring right side of car that feature is impaired. I have had at dealership twice and while the technician knows its an issue there's nothing they can do without Hyundai's decision to correctly fix with software update. I am over 6' tall and where glasses, two things I can't change.

Filed Jul 2, 2026 · Electrical · PA

Description of Safety Defect:The integrated Forward Attention Warning (FAW) driver-monitoring camera located on the steering column continuously fails to track facial structures or pupils during routine daytime driving. This occurs despite maintaining a proper driving posture, adjusting the steering column layout, and removing any facial obstructions.Safety Consequences:When the system falsely registers a "distracted driver" state due to its faulty sensor calibration, it routinely triggers erratic high-pitched chimes and immediately disables active highway driver assistance systems, including Highway Driving Assist (HDA), Lane Keeping Assist (LKA), and Smart Cruise Control. This abrupt loss of active steering guidance and vehicle speed maintenance creates sudden, hazardous driving situations on open highways. Furthermore, to get the faulty alert chimes to clear, the driver is forced to take their eyes off the roadway to stare directly into the steering column sensor camera, actively causing driver distraction.

Filed Jun 16, 2026 · Driver assistance · CA

The driver attention warning feature is defective and often requires you to take your eyes off the road and stare at the DAW sensor in order to eliminate the car's constant "attention" warnings. Even while looking straight ahead while driving, the DAW is often erroneous and will disengage safety features (e.g., lane keeping assist, adaptive cruise control, etc.) because the DAW erroneously thinks that the driver is not paying attention. As another example, if you are driving uphill/downhill or on a curved road and are looking at the road ahead of you at a slight angle, the DAW will erroneously report that the driver isn't paying attention. The system will then disable the cruise control and lane keeping assist, creating a hazardous situation. Alternatively, the driver can look DOWN (not looking at the road) at the DAW sensor and stare at it until the car reacts. This takes your eyes off of the road and creates hazardous situations. As someone who wears prescription glasses, the problem is even worse. I cannot set a comfortable seat/steering wheel configuration where the DAW can "see" through my prescription glasses. If I want to drive in my normal position, I either need to take my glasses off or turn off the safety features (e.g. lane keeping assist and adaptive cruise control) in order to drive. Hyundai is well aware of this problem and it exists across much of the Hyundai and Kia platforms. Dealerships say that the car is working as intended. In reality, the defective DAW system creates more risk and contributes to a significantly less safe ride (as I'm constantly taking my eyes off the road to stare at the darn sensor).

Filed May 13, 2026 · Driver assistance · VA

I am a tall driver (6'4") and I need to wear sunglasses when driving most of the time. The eye tracking device seems generally incompatible with both of these conditions. When the eye tracker fails to recognize my eyes are looking at road it disables driver assist features such as lane centering which can occur unexpectedly and has almost caused me to wreck once. I have tried without sunglasses and squinting at the glare also causes the system to fail. I often have to lift my glasses and stare at the sensor to make the warning go away (in effect forcing me to take my eyes off the road. If sunlight hits it, it also fails. So in summary, this device does not work in the daytime. I have contacted the dealer, and they basically read the Hyundai response I've found online verbatim: summarized, you can't wear sunglasses, prescription glasses, be over 6 foot tall and several other conditions and expect the system to work. There is no way to disable the tracker. There is an option the dealer pointed to, but it is ignored when you turn on any of the assist features. Since this system is currently so unreliable, at best, this is an expensive feature I am unable to use. At worst, the distractions it is causing is going to cause an accident. This is an ongoing issue, date indicates first time issue was noticed.

Filed Mar 18, 2026 · Driver assistance, Electrical · PA

Every 7 minutes of driving electrical failure , happens, which results in Check driver assistance system warning. Once vehicle is turned off, driving 7 minutes error pops again. Due to this all systems : Adaptive Cruise Control , Automatic Emergency Braking , Blind Spot Warning , Forward Collision Warning , Lane Departure Warning , Lane Keeping Assistance , Parking Collision Warning , Rear Cross Traffic Warning gets disabled. This creates a huge risk driving.

Filed Feb 24, 2026 · Electrical · OR

On November 21, 2025, while driving at approximately 60 mph and with approximately 15,685 miles on the vehicle, my 2024 Hyundai Ioniq 5 suddenly experienced a loss of automated systems including adaptive cruise control, lane keeping assist, and forward sensors. The failure occurred without warning. The following day, the 12V battery was completely dead and the vehicle required a jump start to operate. The vehicle was diagnosed with a failed ICCU (Integrated Charging Control Unit). The ICCU was replaced by the dealership on January 6, 2026, under warranty. There were no crashes or injuries as a result of this incident. The sudden loss of driver assistance systems at highway speed poses a significant safety risk, as drivers may be relying on these features and have no warning before they cut out.

Filed Feb 12, 2026 · Electrical, Fuel system · OH

At approximately 10pm on Saturday night with temps in the single digits and a large snowstorm (that would cripple much of the US for several days) just about to hit, the 1.5 year old vehicle failed completely. Propulsion battery 81% charged, started normally, then gave "check electrical system" warning which upon search can be due to a low 12v battery; call AAA and spouse (live 2hrs away). Began to drive towards a station two blocks away, thinking plugging in may help system warm and/or recharge 12v battery. Car goes into limp mode on road, then dies in four-lane road. Use portable battery jumper, draining it into the 12v battery and able to limp-mode out of traffic and into Walmart parking lot entrance where dies again. With bystander help, push the vehicle across parking lot to chargers; vehicle in total electrical failure w/random lights flashing (tail, dash, etc.) and no command-functions (couldn't shift into park, open charging port). Charged 12v battery from an ICE car 30 minutes w/restoration of command function, but nothing more than limp mode. AAA still hours ETA. Personally swap 12v battery purchased from Walmart w/restoration of power, but abnormal function (lane assist forcing wheel, menus malfunctioning) & warnings remaining. Drive vehicle to -thankfully- nearby dealership before another failure. Abandon vehicle & wait for pickup by spouse, drive last hour in a snowstorm. Very lucky I wasn't stranded on the highway, hit and killed in a snowstorm. Very lucky I wasn't hit and killed in the road where it died. Very lucky I called for help early, wasn't stranded more than 20 minutes in dangerous-cold, didn't wreck in snowstorm getting home. Very lucky the malfunctioning systems did not steer/force me into another vehicle or pedestrian, causing injury or death. Dealership confirmed (longstanding and very well-known) failure of ICCU module that Hyundai refuses to properly address. These are unsafe vehicles, hand-grenades on a timer.

Filed Jan 8, 2026 · Driver assistance · SC

The Lane Keeping Assist works well and is very useful. Unfortunately it is combined with the infrared eye monitor system, which is very flaky and does not work well with prescription glasses when sunlight comes in from the front or side. It provides many false warnings, but cannot be turned off without losing the Lane Keeping Assist. If I drive without my glasses, it works fine, but it seems counter-productive to make me lose a good functioning system by tying it to a flaky not-useful monitor.