Adaptive Cruise Control problems of the 2026 Hyundai Palisade

2026 Hyundai Palisade calligraphy, VIN [xxx] , purchased March 6, 2026 with under 2,200 miles at time of incident. Safety incident: while operating under adaptive cruise control at highway speed, the vehicle experienced sudden unintended acceleration followed by severely delayed braking response. At least three trailing vehicles were forced into emergency evasive action to avoid a multi-vehicle collision. Family members were present. This event represents a direct and immediate threat to the safety of vehicle occupants and the public. The root cause has not been definitively identified or resolved. The authorized dealership confirmed can-bus resistance irregularities — 160 ohms versus the designed 120-ohm specification — governing acceleration, braking, and all driver assist systems. Prior symptoms included flickering interior lighting. An initial module replacement failed. Repair has escalated to full wiring harness replacement with no parts availability and no confirmed timeline. The safety event remains undiagnosed and unresolved. The vehicle carries three simultaneous active safety recalls — 293, 296, and 297 — all involving electrical and wiring systems on the calligraphy trim exclusively. None have permanent remedies. The vehicle has been in dealer custody since March 21, 2026 and is available for inspection. Hyundai motor America active case — no. Xxx. This vehicle is not safe to operate. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

On at least 8 occasions, the vehicle has issued a warning to take control now of the vehicle and then begun to stop the vehicle. On 2/16/26, it tried to stop the vehicle on two occasions, and the driver had to press the gas pedal as a car was approaching from behind. I have videos and dash cam videos of several occurrences. It also has determined that an overpass was an obstacle and tried to stop the vehicle. I have taken it to the Hyundai dealership 5x. Hyundai cannot duplicate the issue, but the videos clearly show the problem. It is random. There is a significant defect with the sensors and/or software.

Constant and consistent alerting (attention) with the (steering and eye alert) icons present. Note: it would be helpful to understand and be told the exact sensor or type of alert (eye camera, steering input, forward camera) that triggered the alert! as it stands, every few seconds to minutes the alert states driver is not attentive. Eventually between 2-8 warnings is unrecoverable and the cruise control shuts itself off after a myriad set of warnings. No matter what is attempted the car ends the cruise control and the driver must maintain control at that point (decelerating from highway/interstate speeds dramatically). Myself and all family drivers experience this immediately after activation. Dealership has reported no trouble after 50 miles of driving (as stated). I have video of this issue and am adding them to youtube (2026 Hyundai Palisade cruise control fail) for others to see. This is unsafe and distracting! the alerts alone are enough to deactivate this (if available, but: it cannot be deactivated!) let alone decelerating from speed for "no good reason" outside of drivers direct control. The only solution I have is to not use cruise control and the safety features (as they are marketed to work) and negate the safety features I purchased the vehicle for.

Problem statement: instrument cluster has an instrumentation update lag of approximately 10 seconds. The problem may or not be present when you turn the vehicle on. Description of problem: turning on the vehicle. The instrument cluster does not load properly. Different display elements appear in a different sequence than normal. The speedometer remains at zero even though the car is moving. The lag to begin changing the speed indicated is approximately 7-10 seconds. The car can be moving at 60 miles per hour, and the speedometer indicates zero. When the car is stopped the guage may read the prior steadystate speed of the vehicle. For example. Going from 65mph to a stop the speedometer will continue to read 65mph even though it has stopped. Potential safety issues •driver speed awareness: the driver may unknowingly exceed speed limits, exposing themselves to traffic citations or legal liability. •inability to gauge speed accurately may lead to unsafe driving behaviors, such as entering curves or approaching intersections too quickly. •braking and stopping distance misjudgment: if the driver believes they are traveling more slowly than they actuallyare, they may underestimate stopping distances. This can result in rear-end collisions, failure to yield, or inability to stop in time for pedestrians or cross traffic. •acceleration and merging risks: during highway merging or lane changes, the driver may not accelerate appropriately relative to surrounding traffic. A lagging or frozen speedometer can cause misjudgments of closing speeds, leading to sideswipe or merging collisions. •entering a curve: navigation-based Smart cruise control might expect you to slow down for a curve or exit. But if speed is misrepresented, it might delay braking or deceleration, causing the vehicle to approach the curve too fast, increasing risk of lane drift or rollover. Dealerhas been excellent to work with. They are aware of the issue and are recitifying the problem.