The speedometer in this car is extremely inaccurate and inconsistent with its accuracy. On some occasions, the speedometer can indicate a +-2mph variance at any given speed (good), while other times, the speedometer can indicate a +-6mph variance at any given speed. (bad) The vehicles true speed was verified by GPS speed data and by manually calculating given each individual wheel speed in the car. Both measured speeds confirmed that the vehicles speedometer was off by 5-6mph. No modifications performed to the car. This is a serious safety hazard as the driver is given inaccurate information regarding the actual speed of the vehicle and can lead to accidents.

- Arcadia, CA, USA

When driving early in the morning while it was still dark outside, the car had what seemed to have been a sudden loss of electrical power. The audio for the radio cut off, then the screen for the radio and speedometer went blank, and the headlights also went out. This all lasted for a couple seconds when this happened and then everything came back on fine. I normally would think that this is a defective alternator which it probably is and would be covered under warranty, but after researching this problem I found out that it is a common issue with the 2024 Sonata. I feel that this warrants a safety recall which I seriously doubt will happen but it needs to. If it causes problems with headlights shutting off at night then this is a safety issue. Who knows what will happen if the headlights shut off on you at night and you couldn-??t see where you were going because of it?

- Wake Forest, NC, USA

This has happened three or four times now while I have been driving. While driving, my electrical system will "black out"/"power down"/"shut off." Everything on my dashboard turns off/goes black. My lights turn off. It is like my car shuts down for 2-4 seconds, then turns back on and I can continue to drive. There is no warning, sound, or anything. My car will just abruptly shut off. It is random too. There is no pattern that could help me determine what could be potentially causing this issue. It just happened again last night, while I was on the highway going about 70 mph. This could not only hurt me, but other people on the road. What if the next time my car powers down for a longer period of time" Who is to say what could potentially happen" I intend on scheduling an appointment with a Hyundai dealership to take a look at this issue. But I figured that because this has happened three or four times now, it will probably happen again, and other people are probably having this issue too. It could be a potential defect with the electrical system.

- Kansas City, MO, USA