2023 Hyundai Elantra Hybrid

The cruise control function ceased to properly function after automatically increasing the speed to 110 mph. The vehicle is available for inspection upon request. This is a safety risk for myself and for others on the road. If another combination with this fault were to occur (either physically to the driver or to the software), this could lead to an extreme hazard due to the potential for excessive speeds. The first occurrence for this vehicle happened on 4/21/2025; however, additional instances have been reported going back at least a year for other owners of this same model. Initial issue occurred while setting cruise control from 45 mph to 35 mph and then back to 45 mph. The last instance of 45 mph is when the cruise control quickly increased the set speed to 110 mph. The set speed could not be reduced after the issue occurred. This issue is difficult to reproduce, but will always occur after the first instance until the vehicle is restarted. The vehicle has not yet been inspected by the manufacturer. This is a known issue that has occurred for more than a year now. It appears to not be addressed due to the lack of reproducibility. However, when the software issue happens, it is continually reproducible until the vehicle is restarted. No other warning lamps or erroneous events occurred at the time of the software malfunction.

The contact owns a 2023 Hyundai Elantra. The contact stated that while driving at an undisclosed speed at night, the contact became aware that the driver's side headlamp was not functioning. No warning lights were illuminated. The vehicle was taken to the dealer, who determined that condensation had caused damage to the LED headlamps. The contact was informed that the headlamp assembly needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 16,000.

UNKNOWN I had the lane assist feature on and was taking the second lane from right to turn off to exit when the alarm went off, the wheel turned itself and it started braking. There was nothing where it was trying to avoid and actually almost had me run into another by turning me left back onto the freeway while trying to stop. It’s never happened to me before and I take that way regularly.

For the second time in two years, my horn suddenly stopped working. About 6 months after purchasing the car, the horn began to sound high pitched. Then about three weeks later the horn stopped working, requiring the replacement of the horn. A month later, the horn sounded high pitched again. Hyundai advised me the horn is a "two-horn system" in which a high pitch and low pitch horn produce the horn noise. The low pitch keeps failing. About 4 months after the horn was only sounding a high pitched sound, the horn stopped when I hit the horn to avoid an oncoming driver.

I purchased the car brand new March 2023. I noticed the front driver headlight fogs and has condensation in cool weather. I mentioned to the Dealership and they said it was a known issue but no fix for it. The light was sealed properly. This has been on going since 2023. The condensation has gotten worse and is a safety visability issue.

The car has been making clicking noise when braking or acceleration for about a year. I had all recalls software updated. I have brought it in multiple times. First saying a wheel bearing needed replacement, then a lose bolt. It helped for a while and then the clicking started again. Then the system failure occured recently and all the lights came on. The dealer currently cannot figure out what the issue is. The ABS light is on and the brakes don't seem to be working properly. I can't safely drive the vehicle and have no car to drive now. I have had the car a little over two years so lemon law most likely does not apply to this situation.