There are 2 stored owner reports matching the speed control & cruise leading-label group for the 2025 Hyundai Kona in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
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Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)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 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)
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.