2023 Hyundai Kona

After a routine service visit, the vehicle’s braking and speed‑control systems began to behave abnormally. The ABS/ESC control module was replaced or reprogrammed without documentation, and immediately afterward the vehicle’s braking feel, speed‑control behavior, and forward‑collision warning timing changed noticeably. These changes created a safety risk because the vehicle no longer responded in a predictable way compared to its original performance. The affected components are available for inspection upon request. The issue was reproduced multiple times under normal driving conditions. Braking response became inconsistent, and the speed‑control system no longer behaved as it did before the service. The timing and behavior of forward‑collision alerts also changed compared to pre‑service operation. These changes created unpredictability in traffic, especially during following‑distance adjustments, stop‑and‑go situations, and sudden‑braking scenarios. The dealership did not provide technical documentation or explanation for the module replacement or configuration changes and did not acknowledge the change in system behavior. The manufacturer’s customer service reviewed the case but did not provide technical findings. An independent service center could not verify the original configuration because the manufacturer did not provide the Manufacturer Build Sheet. The vehicle has not been inspected by police or insurance representatives. No warning lamps or dashboard messages appeared before or after the issue. The only indication of a problem was the sudden change in braking, speed‑control, and forward‑collision system behavior immediately after the service visit.

My Kona N Line is not functioning well. Especially after driving for a longer period of time. About 60% of the time, upon letting go of my brake, the car jerks. Going from 0 - 5 mph is the worst. The car definitely hesitates many times. Again, it is when I have driven it for over 10 minutes. I took the car to a service department in El Monte, CA on 11/1. They cannot find the problem. They rode with me and it did not show at that time. They released the car to me. The Kona N has a recall but not my car, the Kona N Line. The recall is for the same problem. I am extremely frustrated. I have another appointment on Tuesday of this week to take to the Glendora service department. I don't know what to do. I am not one to complain but this is not safe. This is my fifth Hyundai. Nothing but good cars until now. Please advise. [XXX] [XXX] . INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I was trapped inside the liftgate of my 2023 Hyundai Kona and was unable to operate the emergency release. I had the key fob with me and the car was unlocked, but the trunk would not open from the inside. I tried sliding a standard key and a flat card into the release, but it would not engage. It was not specified that the mechanical key inside the Hyundai fob was required. The release is a small black sliding latch at the bottom of the liftgate with only a car symbol. It is recessed, not easily visible in low light, and does not glow in the dark. I also could not climb over the rear seats because the liftgate hood was sealed, so the fire department had to open the trunk to get me out. Even the operator and the fire department found the instructions difficult to determine. While this may be a rare circumstance, it could have been dangerous. I was able to get out safely, but it would be helpful if the emergency release were redesigned with clearer instructions or made more visible, such as using neon or glow in the dark markings, so that in the future it can be accessed more easily by anyone inside.

The issue is the horn. On three different occasions, I've attempted to use the horn and it wasn't working. I've taken it to Hallmark Hyundai in Flowood and they've repaired and/or replaced the horn on four separate occasions. The new horn is always working when I leave the dealership, but it eventually goes out. Or it goes out for a period of time and then comes back without explanation. My most recent horn outage happened while I was driving on I-55 in Jackson MS and an 18 wheeler started shifting in my lane. I wasn't able to notify them with my horn and ended up having to drive on the shoulder to avoid a collision. This is a major safety issue and they haven't taken the time to remedy it.

The contact owns a 2023 Hyundai Kona. The contact stated that while pressing the horn pad, the horn failed to produce a sound. The vehicle was taken to the dealer, and the horn was replaced; however, the failure persisted. The contact stated that the horn had been replaced four times and was scheduled for a fifth horn replacement. The manufacturer was informed of the failure and opened a case. The failure mileage was approximately 12,000.

The horn is not working in my vehicle. I found this out today when I almost had someone collide with my vehicle while I was on the highway, not once, but twice. I was unable to use my horn to alert the other driver. I called Hyundai and they said it is not covered under warranty and this is a known issue with my vehicle. I have only had the vehicle for 3-4 months and this should not be happening. I cannot safely drive without a horn and if something happens to me or my vehicle and Hyundai knows its an ongoing issue with this year, make, and model, I am not sure what I can do. Please make this right.