Sudden loss of acceleration. This occurred while making a left turn across traffic from a stop. At approximately 7mph the car would not accelerate any further. I was luckily able to coast the vehicle into a center turn lane. Upon coming to a stop I was unable to get any acceleration. The vehicle was turned off and turned back on again and operated normally. There were no trouble codes displayed.

Source: NHTSA complaint ODI #11720493 · view all complaints for this vehicle at nhtsa.gov

The entire dash cluster including the radio display cuts off and back on while driving. The only way I can describe it, is that the car seems to act like it was turned off then back on again. Initial lights when you start the car come on, seatbelt lights, initial startup dash lights, headlight indicator, headlights, radio, drive setting, everything turns off and back on while driving. Lasts for anywhere from 5-15 seconds. this has been going on for over a year now and the dealership has been made aware and have attempted to recreate the incident without success. It doesn't happen with any one way of driving, it happens at random times and so quickly, no photo evidence is able to be obtained. This most recent incident I did have a dashcam installed and it powered off and back on as it does when the vehicle is turned on and off. A different situation that my car has been having that is unable to be recreated is that the windows will lock up and not go down as well as when this happens the doors either remain locked unable to be unlocked or don't lock at all. This has also been reported to the dealership and they held my vehicle for a week attempting to recreate it without success even though I have multiple video evidence of this occurrence. I do not have pictures, but do have videos and it will not let me upload videos.

Source: NHTSA complaint ODI #11756636 · view all complaints for this vehicle at nhtsa.gov

We were backing up and leaving a parking space when the emergency braking system overrode our driving and forced a stop. This has happened many times, once while turning at a red light (which we had the right-of-way) and our car stopped on the middle of the intersection. Another time was during a turn in a non-traffic light turn lane where timing is important. Our car was again completely stopped in the middle of the road in oncoming traffic.

Source: NHTSA complaint ODI #11739988 · view all complaints for this vehicle at nhtsa.gov

Factory OEM Michelin Primacy All Season Tires (tire size 215/55R17) on a front-wheel drive 2024 Hyundai Sonata SEL with the 2.5L gasoline engine. At around 4,000 it had issues momentary issues with keeping traction in the rain when starting to accelerate after being stopped before regaining traction. Sometimes the traction control light would on the dash during the momentary loss of traction. Problem worsened over time and the tires are now very worn at 34,000 miles. At one point, I almost lost control of the car and almost crashed when slowing down after the steering wheel started moving to the left itself because of one of the front tires. Tires were properly maintained and rotated at scheduled maintenance intervals.

Source: NHTSA complaint ODI #11763930 · view all complaints for this vehicle at nhtsa.gov

The contact owns a 2024 Hyundai Sonata. While driving at an undisclosed speed, the seat belt warning light intermittently illuminated with an audible chime while the driver’s and passenger's side seat belts were properly buckled. Additionally, on two separate occasions, the horn was inoperable, and the anti-collision warning light illuminated while driving. The vehicle was taken to the dealer and two other dealers, Alexandria Hyundai (1707 Mt Vernon Ave, Alexandria, VA 22301) and Sheehy Hyundai of Waldorf (2910 Crain Hwy, Waldorf, MD 20601), who were unable to duplicate the seat belt failures. The third dealer, Sheehy Hyundai of Waldorf (2910 Crain Hwy, Waldorf, MD 20601), determined that the horn needed to be replaced. The vehicle was not yet repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 2,000.

Source: NHTSA complaint ODI #11725462 · view all complaints for this vehicle at nhtsa.gov

Driving on road and hear grinding. Pull off and check underbody and see undercover dragging the pavement. Going speed limit prior to hearing noise of grinding undercover and no impacts or damage occurred to bumper or undercover prior to ripping and dragging the ground

Source: NHTSA complaint ODI #11757588 · view all complaints for this vehicle at nhtsa.gov

Intermittent issue. On startup, the hvac system cycles through the modes and gets stuck blowing on mixed mode (face and feet) regardless of what mode is selected. The problem is temporarily fixed by manually tapping the mode button until the desired mode is selected.

Source: NHTSA complaint ODI #11747323 · view all complaints for this vehicle at nhtsa.gov