2024 Hyundai Sonata

The horn on my vehicle completely stop working. There were no alert messages and I found out that it wasn't working when I needed to use it. I was driving 55 miles per hr in a highway and another vehicle was about to switch lane to merge into my lane and driver did not see me and almost got into an accident. When I try to use the horn to alert tge other vehicle, horn did not work. It still doesn't work. Took my vehicle to Millenium Hyunday Dealership in Hempstead, NY and was told by service advisor that horn is only covered up to 60,000 Mike's because is an electronic feature. I disagree with that assessment and believe this is a safety feature that needs to be reevaluated.

While driving the vehicle the other night, the cars electrical system completely shut off for a few seconds before popping back on. The whole car inside and out went completely black. It was around 10pm on a dark country road. I had the seat heater on high and the defrost on high because it was cold. It appeared to happen when the auto high beams were supposed to engage. Instead of them engaging, the whole cars electrical system just shut off. No headlights, no instruments, interior lighting, console display, nothing worked. The car was in battery mode at the time, and it sounded like the whole car just shutoff. I took my foot off the accelerator wondering what happened, and before I could understand what was going on, everything came back on. It did not prompt me to start the vehicle again. The auto on/off brights never worked like they were supposed to again either. I had to manually engage and disengage them. Thankfully it was just me on that stretch of road going 30mph at the time or it could have ended badly.

After a dealer-installed software update on my 2024 Hyundai Sonata sel awd, the car began jerking during acceleration and shifting. This happens at low and moderate speeds and creates an unsafe hesitation, especially in traffic. This issue did not exist before the update. I believe the software update affected the transmission or engine control calibration. The dealership has not resolved the issue, and it poses a safety concern. Please investigate whether this is linked to a faulty update affecting other Sonata vehicles.

Vehicle suddenly accelerated after pulling out of store parking lot at low speed into side street behind vehicle stopped at light (less than a car length in front) while pressing hard on brake. Vehicle lurched forward incrementally during the braking process, but vehicle kept accelerating causing vehicle to hit stopped vehicle numerous times before vehicle engine was finally turned off. Driver of both vehicles could have been seriously hurt. Vehicle was driven home after this incident without incident but has only been driven out of garage and onto and off towing truck. Car has not been inspected except for damage to vehicle and is currently awaiting insurance rep inspection at vehicle repair facility. Once damage is repaired car will be towed to dealership for inspection. Because of the short distance vehicle traveled no warning lamps/messages were noted.

The DAW (Driver Attention Warning) system is obtrusive and a distraction to safe driving. The alert makes an audible "Beep" and the drivers display lights up with a warning to "Take a break". This alert will continue every 5 minutes if on a winding road until the car is stopped and the engine is turned off. When operating the vehicle in a safe manner keeping my eyes on the road and having the beeping and warning lights distracting me is quite the opposite of its intended purpose. In previous year models this could be turned off by the owner. This is not so with the 2024, 2025 models. This is not isolated to this vehicle but a search of the internet will find many frustrated owners all voicing their concerns. A safety alert system should not become a safety hazard. The dealer has no solution. The alert system cannot be turned off or it's sensitivity adjusted. The manufacturer has so far not responded to my complaints.

My vehicles speedometer is always reading 1-4 mph faster than the actual speed I am driving at. For example cars speedometer would read 67 but only actually going 63. I’ve noticed it’s always 1mph off but whenever driving the car and turning it off to say get gas and turn right back on, the speedometer will begging reading 3-4 mph faster until leaving the car off for a few hours then it would go back to only reading 1mph faster again.

I along with other people on various websites have noted that the 2024 N-Line has something wrong with the speedometer. I first noticed is on the waze that is was different. It must have something to do with the internal GPS of the car. I tested it alongside another car and it is indeed off. It happens after driving the car into a place that isn't obvious on the map. I brought the car to the dealership and they weren't able to help. I know there is a slight allowance for speedometer being off, but this is way off. For example, it can show one is going 25, while really going 20. This causes me to have to look at Waze to get proper speed. This is a real issue and if search hyundai sonate N-line speedometer being off, you can find other people talking about this issue. Please really look into this as this is a major concern that falls outside the allowed difference in speedomter and actual speed

The speedometer is not always accurate. About 75-80% of the time at highway speeds the speedometer shows 4mph higher than WAZE. While I understand this could be a WAZE issue itself, I have completed the following test. I was driving at highway speed with my wife following me in her vehicle. My speedometer is 4MPH faster than WAZE in my car, WAZE in her car and her speedometer. My WAZE, her WAZE and her speedometer all matched exactly. This is not a 1 time thing, it happens way more often than not.