Hyundai Tucson Hybrid collision warning problems

Filed Nov 6, 2026 · Brakes, Driver assistance · WI

On approximately three to four occasions, my 2025 Hyundai Tucson Hybrid has suddenly jerked or decelerated while driving, creating the sensation that the brakes were being applied unexpectedly. During there episodes, the vehicle did not respond normally to acceleration until the apparent braking released. A particularly dangerous incident occurred on XXX, when I was entering traffic after leaving a Subaru dealership in [XXX]. The vehicle unexpectedly jerked and failed to accelerate normally while applying the gas pedal. Another driver had to brake to avoid a collision with my vehicle. Hyundai Recall 302 addressing potential unexpected activation of the forward collision avoidance braking system, had already been completed on my vehicle on June 30, 2026. I reported these recurring incidents to the Zimbrick Hyundai service manager on XXX. The braking concern has not been diagnosed or repaired. I do not know whether these incidents are related to Recall 302 or another malfunction. However, I am concerned about unexpected braking or deceleration occurring in traffic and the risk of a serious collision. Attached are documentation confirming completion of Recall 302 on June 30, 2026 and email correspondence with Zimbrick Hyundai service manager documenting my report of the recurring braking incidents dated XXX. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 15, 2026 · Driver assistance · UT

On Monday, 09/14/2026 at approximately 10:15am Mountain Time Utah State Route 36, North-bound. -- I was driving straight, approximately 60mph on dry road on a sunny day. There was no other traffic on the road either ahead, alongside, or behind me and no oncomming traffic. The Automatic Emergency Braking engaged, the emergency braking indicator flashed on the dashboard and the car slowed way down and then it just stopped engaging and the car rolled freely. I believe that the forward collision warning also sounded. NOTE-- this is not the first time this has happened to me. It has happened at least 3 to 4 times over the past two years since we leased the vehicle. I have asked the dealership service department to look at it, but they state that they can find no indication of any problem and that they have been unable to reproduce the event.

Filed Aug 28, 2026 · Driver assistance, Electrical · 9,419 miles · NH

The contact owns a 2025 Hyundai Tucson. The contact stated that the vehicle was included in the federal safety agency Campaign Numbers: 26V400000 (Electrical System) and 26V316000 (Forward Collision Avoidance); however, approximately 15 minutes after the software updates were completed, the lane keep assist failed intermittently, causing the vehicle to veer out of the intended lane. No warning lights illuminated. The vehicle was returned to the dealer; however, the vehicle was not diagnosed or repaired. The manufacturer was notified of the failure, and a case was opened. The failure mileage was approximately 9,419.

Filed Aug 25, 2026 · Driver assistance · NJ · crash · 1 injury

I was driving at a low speed (10-15mph) with a safe distance between me and the vehicle in front of me when the semi truck in front came to an abrupt stop. I reacted appropriately by pressing on the brake, however, my car accelerated into the vehicle instead. None of the emergency brake systems activated including the automatic emergency braking and front collision warning, which lead to my car driving into the semi-truck.

Filed Aug 13, 2026 · Driver assistance · 18,600 miles · CA

The contact owns a 2025 Hyundai Tucson. The contact stated that while driving at an undisclosed speed, the Forward Collision Avoidance system independently activated, and the vehicle came to a hard stop. The contact was pushed forward very hard. The contact stated that the event was frightening. The vehicle was driven to the nearest local dealer; however, the vehicle was not inspected. The vehicle was later towed to another dealer; however, the failure was not duplicated. The contact stated that the recall repair of the federal safety agency Campaign Number: 26V316000 (Forward Collision Avoidance); was completed July 12, 2026. The contact stated that the failure had occurred shortly after the recall repair was completed. The manufacturer was made aware of the failure but provided no assistance. The failure mileage was approximately 18,600.

Filed Aug 13, 2026 · Driver assistance · 17,850 miles · PA

The contact owns a 2025 Hyundai Tucson. The contact stated that while driving 22 MPH and attempting to depress the brake pedal, the vehicle in front of the contact stopped suddenly, causing the vehicle to stop suddenly. There was no warning light illuminated. The vehicle was serviced under the federal safety agency Campaign Number: 26V316000 (FORWARD COLLISION AVOIDANCE) by the owner, but the remedy failed to fix the vehicle. The contact stated that the failure had occurred twice. The contact stated that the recall remedy failed to alert the driver to a possible crash. The manufacturer was notified of the failure and opened a case. The failure mileage was 17,850.

Filed Jul 29, 2026 · Engine, Fuel system · VA

On XXX the vehicle lost motive power while my wife was accelerating to merge onto a highway with our two young children aboard. It would not accelerate and she was forced to pull over in an active merge area. Simultaneous warnings illuminated: Electronic Parking Brake, ESC, Forward Collision Avoidance, Blind Spot Detection, and hybrid system, with "Check Hybrid System" displayed. No crash or injury occurred, but loss of propulsion during a highway merge created serious collision risk. This is a recurring defect documented since early 2023: Hyundai's own Blue Link telematics auto-flagged an Engine Control System DTC on XXX; a jump-start was required XXX (dealer RO #XXX); check engine light and stored CAN-bus codes U100387, U100100, U004600, U010100 on 08/10/2023 (RO #XXX); and a September 2023 incident in which the center display shut off during reverse, disabling the backup camera. Hyundai performed Service Campaign 9B4 (BMS software update, DTC P1BB20, TSB 25-01-010H-1) on this VIN on XXX; the same failure category recurred 84 days later. The vehicle was towed to Safford Hyundai of [XXX] onXXX and has remained there 65+ consecutive days. The dealer replaced the 12V battery (defect persisted) and the Hybrid Power Control Unit (HPCU); per Hyundai Consumer Affairs' own written email ofXXX, the check engine light returned after the HPCU replacement and the cause "remains unidentified." The dealer states it cannot determine the root cause. The vehicle IS available for inspection at Safford Hyundai of Springfield, [XXX]. Five Hyundai Consumer Affairs cases exist on this VIN (current: #XXX). INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jul 17, 2026 · Driver assistance, Electrical · FL

The vehicle was taken to the dealership for Recall 304 (the federal safety agency Campaign 26V400), which was supposed to fix an instrument panel/heads-up display (HUD) communication loop crash. However, the software update merely isolated the crash so that only the HUD goes black and reboots while driving. The underlying signal drop or hardware defect is still actively occurring. The issue may appear to be a loose physical connection or faulty wiring harness, as the HUD loss may be triggered after hitting a bump or uneven road surface, though it remains intermittent. The driver's safety is compromised due to sudden, unpredictable driver distraction. Vital safety information, including vehicle speed, blind-spot monitoring alerts, and forward collision warnings, is instantly lost. The vehicle was returned to the dealership, but technicians stated they "did not find anything on their test drives (<15miles)" because the hardware dropout is intermittent. The vehicle was inspected and worked on by an authorized Hyundai dealership service center for the initial recall but they failed to diagnose the persistent post-recall failure.

Filed Jul 9, 2026 · Driver assistance · 5,000 miles · SC

The contact owns a 2024 Hyundai Tucson. The contact stated that on three occasions while driving at 65 MPH, the automatic emergency braking system engaged erroneously. While driving at 45 MPH, the failure recurred, but the vehicle resumed normal operation. The automatic emergency braking message illuminated on the instrument panel. The contact related the failure to the federal safety agency Campaign Number: 26V316000 (Forward Collision Avoidance). The vehicle was taken to the dealer, but the dealer was unable to duplicate the failure. The vehicle was not diagnosed or repaired. The manufacturer was notified, a case was opened, and the contact was informed that the dealer would have to duplicate the failure for repair coverage. The failure mileage was approximately 5,000.

Filed Jun 29, 2026 · Airbags, Driver assistance · 7,700 miles · MA · crash

The contact owns a 2026 Hyundai Tucson. The contact stated that while slowly driving into a parking space, the vehicle suddenly stopped and then suddenly jolted forward and crashed into a guard rail and steel fence in front of the local Post Office. During the crash, the front end of the vehicle was severely damaged, but no air bags deployed. No injuries were reported. A Police report was taken at the scene, and the vehicle was towed to the local dealer. The cause of the failure was not yet determined. The manufacturer was not contacted after the failure. The contact was later informed of the federal safety agency Campaign Number: 26V316000 (FORWARD COLLISION AVOIDANCE). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 7,700.