Hyundai Tucson adaptive cruise problems

Filed Oct 15, 2026 · Acceleration, Driver assistance · MD

I am submitting this complaint to report a potential safety concern involving the Forward Safety (Collision-Avoidance) System and Smart Cruise Control System in my Hyundai vehicle. I am concerned that these warnings may indicate a problem with safety-related driver-assistance systems, and I want to bring this issue to the federal safety agency's attention so it can be evaluated for potential risks to other vehicle owners. Vehicle and diagnostic information as - Make: Hyundai - Model: Hyundai Tucson SEL FWD - Model year: 2024 - Purchase date: March 2024 - Odometer reading: 24,359 miles - Diagnostic Trouble Code (DTC): C174181 - System identified in Bluelink: Chassis - Date the code originated: October 13, 2026 Description of the problem My vehicle's dashboard displayed the following warning messages: - Check Forward Safety System (Collision-Avoidance System) - Check Smart Cruise Control System On my Hyundai Bluelink account also displayed an “Attention Needed” notification identifying one chassis diagnostic trouble code, C174181, originating on October 13, 2026. These warnings concern systems intended to assist with collision avoidance and vehicle following distance. I am concerned that their malfunction or unavailability could reduce the vehicle's driver-assistance capabilities and potentially create a safety risk while driving. I am reporting the symptoms and diagnostic code for the federal safety agency's evaluation; I do not yet know the underlying technical cause. My primary concern in filing this report is vehicle safety. I request that the federal safety agency record and evaluate this complaint and determine whether similar reports involving Hyundai vehicles indicate a potential safety-related defect that warrants further investigation. I am submitting this information to help identify any possible recurring problem that could affect other drivers, passengers, and road users. I can provide screenshots from Bluelink, warning-message photographs, repair orders and additional diagnostic information if needed. Thanks

Filed Sep 30, 2026 · Driver assistance · 11,000 miles · NY

The contact leases a 2025 Hyundai Tucson. The contact stated that while driving 72 MPH, the adaptive cruise control deactivated, and the vehicle decelerated unintendedly to 60 MPH. The messages "Front Assist Collision Warning" and "Front Assist Collision Limited" were displayed. The contact stated that while reversing, the vehicle stopped abruptly, jerking the driver back and forth. Additionally, the Rear Cross-Traffic Alert system was intermittently inoperable. The vehicle was taken to the dealer, and the front camera software was updated under the federal safety agency Campaign Number: 26V316000 (Forward Collision Avoidance); however, the failure recurred. The vehicle was taken back to the dealer, and the front camera underneath the bumper was found slanted; the camera was adjusted; however, the failure persisted. The contact stated that there was an abnormal humming sound coming from the radio. The manufacturer was notified of the failures several times and referred the contact back to the dealer for assistance. The failure mileage was approximately 11,000.

Filed Sep 27, 2026 · FL

The "Consider Taking a Break" advisory comes on as far too often creating a dangerous distraction. As an example: when traveling on a straight road with the cruise control on and making no significant steering inputs other than that required to keep the vehicle going straight, the alert would come on about every 4 minutes. Sometimes it would repeat in as little as 1 minute. This went on for more than 40 miles on [XXX] between [XXX]. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 17, 2026 · Driver assistance · AZ

I always have the Forward Attention Warning turned off in Vehicle Settings. This past week, 8/13/2026, while on the freeway I was doing the speed limit which was 70 mph. I had the Cruise Control turned on as well as the Lane Assist. While briefly changing the map setting on the display and not looking forward I got the warning “Eyes on the road, Hands on the wheel”. I got that warning twice within a minute. I was in the middle lane of a 3 lane freeway with fairly heavy traffic. All of a sudden there was loud beeping and the flashing red message “Take Control Now, Vehicle Stopping” The cruise control disengaged and the brakes were applied. My speed dropped from 70 down to 55 before I was able to regain control. Two minutes lather the exact same thing happened for a second time. Needless to say the traffic behind me also had to brake to avoid hitting my car! I have done some further testing and discovered while the Cruise Control is turned on the infrared camera behind the steering wheel is always active, regardless of what I have selected in Settings. If the Cruise is not turned on then the infrared camera will not function unless it is has been turned on in Vehicle Settings. I was very lucky that I didn’t cause an accident. Sooner or later someone isn’t going to be as lucky. The Forward Attention Warning System needs to be removed as a “Safety” feature. It is an accident waiting to happen! Another question is what will the effect be on my eyes after hours of exposure to the infrared camera beams? Has that been evaluated from a health standpoint? I don’t see any positive benefits of having the infrared beams constantly beaming into my eyes for hours and hours on a long trip.

Filed Aug 2, 2026 · Driver assistance · PA

Unintentional and unexpected activation of emergency collision or adaptive cruise control, causing the vehicle to stop and become immobile in the lane of traffic. I was driving down the interstate with the adaptive cruse control on and the lane keeping assistance on. These both were on for about 20 minutes as I was driving down the highway. There were no vehicles in front of or behind me for a quarter mile or so. I as all alone with nothing around me. All of a sudden it seemed like the collision avoidance system activated. The car came to a complete stop in the right lane of the highway. I tried to proceed and could see the emergency brake was on, the engine was running the car was in drive but it would not move. Flipped on the hazard flashers and traffic caught up to me while sitting in the right lane of the highway waiting to get rear ended. Vehicles were barely getting by at 70 MPH. The car would I pressed the accelerator and the car move d forward enough to get off the highway, this took a minute or two. Once off he highway, I could see the emergency brake would not release. I turned the engine off went out to inspect all the forward sensors. There was no visible issue. I restarted the car after a minute or so and it proceeded normally. That was Saturday, this is Sunday, I am taking the vehicle to Hundai tomorrow for inspection.

Filed Jul 22, 2026 · Driver assistance · NY

I lease a 2025 Hyundai Tucson SEL. This vehicle has experienced repeated electrical and safety system malfunctions. Display/infotainment failure: The center display has shut off while driving on at least 10-15 separate occasions. This has occurred while I was actively using CarPlay for navigation in an unfamiliar area, causing loss of directions while driving. Forward collision/automatic emergency braking (AEB) malfunction: The AEB system engaged unexpectedly and unpredictably while I was driving on the highway, causing the vehicle to brake suddenly. This resulted in another vehicle rear-ending me. This occurred while I was driving home from a doctor's appointment. I understand this vehicle/system was subject to a manufacturer recall related to this issue. AEB failure to engage when needed: On a separate occasion, while I was backing out of a parking spot, the emergency braking system did not engage or respond when needed, and I narrowly avoided being struck (T-boned) by another vehicle. Warning system malfunction after repair: Following the highway incident, I brought the vehicle to an authorized Hyundai dealer, who performed a front safety system software update. Approximately two days later, while driving on the highway, a dashboard warning appeared related to the front safety system. This warning disabled cruise control and other related features. Dealer inspection/dispute: I brought the vehicle back

Filed Jul 14, 2026 · Engine · NC

While driving on the highway with adaptive cruise control on, car began decelerating without any vehicle in front. Started to get off highway, check engine light began flashing and came to a full stop. Car died. Tried restarting and car died. Check engine, oil and battery lights then on. Total engine failure and no warning lights prior.

Filed Jul 10, 2026 · Brakes, Driver assistance · IL

When driving have been reviving a warning that says adaptive cruise control failure followed by a short time were the car may unexpectedly break on the interstate.

Filed Jul 7, 2026 · Engine, Fuel system · VA

Subject: Urgent Drivability Concern – 2024 Hyundai Tucson (6/22 Incident) Vehicle: 2024 Hyundai Tucson Date of Incident: XXX Trip Details: [XXX] to [XXX] (~160+ miles) Summary of Issue: During a long-distance drive on XXX, the vehicle experienced severe and consistent drivability issues that created unsafe driving conditions. Symptoms Observed: •Severe loss of acceleration / stalling behavior throughout the entire trip •No check engine light illuminated at any time •When pressing the accelerator: oTachometer increased (RPMs rising) oVehicle speed decreased or failed to increase appropriately •Significant delay in acceleration, especially when: oMerging onto the interstate oPassing other vehicles •Cruise control behavior: oSeemed to manage acceleration more effectively than manual throttle oHowever, still exhibited slow response when additional acceleration was required •Auto Start/Stop system: oSystem automatically disabled itself oWould not allow reactivation during the trip Safety Concern: This condition made it difficult and unsafe to: •Merge into traffic •Maintain appropriate highway speeds •Execute passing maneuvers Dealer Visit (Near [XXX]): •Vehicle was inspected after sitting for a couple of hours •Dealer reported no issues found •However, the problem was persistent and clearly present during operation under driving conditions Took vehicle to a dealership in Raleigh and asked that they look at the fuel injectors. They determined that all 4 injectors were failing and replaced them under warranty. Concerned that Hyundai America has not issued a recall as driving the vehicle with this issue creates a serious safety concern that would lead to injury or loss of life INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 21, 2026 · Driver assistance, Steering · PA

I am writing regarding a serious vehicle safety issue involving my 2023 Hyundai Tucson Limited purchased from on [XXX] with approximately 61,000 miles. About one month after purchase, during a drive from Pennsylvania to Florida in October 2025, the vehicle experienced multiple dangerous steering and collision-assist malfunctions in clear highway conditions. The first incident occurred in Virginia while adaptive cruise control and steering assist were active at approximately 70 mph. Within seconds, the steering wheel aggressively turned left and right, causing the vehicle to tip and nearly roll until the driver manually regained control. Later during the same trip, while making a normal lane change with the right turn signal activated, the vehicle falsely detected a collision despite no vehicle being present. The vehicle then veered left toward traffic and unexpectedly slammed on the brakes. Following these incidents, all assist sensors and automated driving features were manually disabled for safety reasons. However, the vehicle has continued intermittently triggering false collision warnings and emergency braking events with no vehicles present, creating additional near-accident situations involving surrounding traffic. I recently had the vehicle inspected by Hyundai after initially believing this may only be a calibration issue. Due to financial and scheduling limitations, I delayed service until this month, but I now understand this issue is far more serious and systemic. Two separate mechanics have advised me the vehicle has major safety-system malfunctions making it unsafe to drive. There are no reported accidents or braking issues on Carfax. I am also concerned this appears to be a widespread issue affecting this vehicle model, yet I received no notification regarding related safety concerns or recalls until conducting my own research. One mechanic stated“I’m surprised this car hasn’t killed you yet. I wouldn’t put my own kids in this vehicle." INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION