2025 Hyundai Kona

A week after I got my 2025 Hyundai Kona Limited, while trying to have the moonroof when headed into the highway since it gets too noisy if left open, the glass will touch the guard and then back away and remain fully open. However, the issue becomes more serious when it starts to rain or snow as it will remain open. In three occasions, the moonroof will not close. During a downpour, I had to use a large umbrella to avoid water to flood the car. Had I not had an umbrella or something to prevent water from getting in, the vehicle electronics could have become damaged including my personal belongings including but not limited to my sensitive medical equipment. Had I been in a snow shower, I will have gotten sick with a cold. I had reported the issue several times to different dealers and they only say it needs to be cleaned and reset. I had a Sonata with the same moonroof for over three years and I never experienced such an issue.

I have a 2025 Hyundai Kona Limited. On [XXX], around the afternoon on Sunnyvale, California, while exiting [XXX] headed to Lake Tahoe, the liftgate bolt that attaches to the body had buckled mechanically as the system did not back away when a flashlight that came out of a travel bag was blocking the way to have it closed. The car computer thinks the liftgate is open even though the lock is secured. The car computer allows to drive without seatbelts secured or closures ajar for a few seconds at low speed but then it automatically with little warning engages the electronic handbrake while driving. I was driving on a highway in a middle lane when the car engaged without my consent the electronic handbrake locking the wheels and I almost got rear ended and killed by a semitruck. I had to floor the gas pedal and steer to a shoulder to request a tow. Since it was a long weekend before Presidents Day, I had the car taken to the nearest dealer in Modesto California. Their service department invented a lie that due to a side crash, which was a failure of the collision mitigation system that happened months ago, is the cause and that it is my fault even though the driver admitted responsibility but it is an unrelated issue. There should be a way of overriding the car computer so it does not engage the electronic hand brake on the middle of the highway, specially at night as this creates a road hazard that can lead to death. I replicate the issue with a rental, a Hyundai Tucson, they use the same gas strut and bolt that in my opinion has a very narrow gage. As you can see in the picture, the passenger side bolt is fine, the driver side is buckled. The side accident that happened on May 2025 was on the passenger side but the liftgate is fine; at any rate both sides should be deformed not just one if that were to be the case but it is not. Dealer and Hyundai attempting to sideline the issue to avoid a warranty and recall in my opinion. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

While the cruise is set, traveling on I44 with no other car in front of my Kona, the adaptive cruise control will start to flash and apply brakes immediately. The speed will drop instantly. Thankfully no other vehicle has been behind me, otherwise it would have caused a massive wreck. I have taken the Kona to the shop 5 to 6 times for this situation, but they will not do anything since they can not duplicate it. I took a video recording of it happening, and they still would not do anything. The first incident was December 31, 2024. This happens every other week when I travel out of town for my daughter parenting time with her dad.

The contact owns a 2025 Hyundai Kona. The contact stated that while upon starting the vehicle, the vehicle failed to respond as intended, and the vehicle needed to be jump-started. The vehicle was taken to a dealer to be diagnosed; however, the diagnostic result was unknown. The vehicle was not repaired. The failure had occurred on several occasions. The manufacturer was notified of the failure and informed the contact that the vehicle did not fall under the Lemon Law. The failure mileage was 12,000.

The cruise control operation is unusual and the speed can vary greatly while it's engaged in moderately hilly terrain (not extreme) on the interstate ([XXX] through Kentucky and Tennessee). With the cruise set at interstate speeds and starting to climb a hill, the speed can drop by as much as 6mph below set point as the cruise control very, very slowly starts to increase throttle to compensate for the grade. Eventually it will stop the deceleration at that up to 6mph speed below the set point, before slowly starting to accelerate back up to the set point. One instance I timed was 22 seconds between the speed first falling below the set point, down to 6mph below, before recovering back to the set point. Sometimes it overshoots the set point by 2mph, meaning it could cause you to exceed the speed limit and/or your intended driving speed if the uphill is long enough for the speed to fully recover itself. It is not an issue with vehicle power available as I can easily maintain an exact speed through the same hills using the throttle manually without cruise control, it is only an issue with how the cruise control is programmed or executed. An 8mph variance with cruise control on the interstate in non-extreme terrain is a safety concern because it makes the vehicle unpredictable by other drivers who are trying to time their maneuvers around trucks and other vehicles and when my car suddenly slows significantly next to them they have to suddenly change or abort their maneuvers. It has not been reviewed or inspected by anyone else. It is a rental vehicle and not available for inspection by request from me, but may be from the owner. There were no warning lights or any other indication there was a problem recognized by the vehicle. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

As part of Hyundai’s Driver Attention Warning system, it plays a loud beeping noise that disables other systems in the car (map, audio). This beeping noise plays at random times and has been heavily distracting on long drives almost causing me to crash due to issues with my hearing and the frequency of the noise. It cannot be disabled. I would be happy to present the vehicle for inspection. The dealership and manufacturer have not responded to calls or have given unsatisfactory feedback as to solutions. This alarm has gone off about three times within the past 10 minutes and i am struggling to drive long distances with it on. Any help please.