2025 Hyundai Tucson Hybrid

On [XXX], my 2025 Hyundai Tucson Hybrid displayed a red dashboard alert instructing me to “stop vehicle and check brake system.” The vehicle experienced brake system warnings and a loss of power steering, requiring me to pull over. I immediately contacted Hyundai through the Bluelink system, and the Bluelink operator confirmed that multiple fault codes were visible in Hyundai’s system. I scheduled a Hyundai service appointment at the next available date. On [XXX], before the scheduled service appointment could occur, the vehicle experienced a sudden and total electrical failure while traveling at highway speed (approximately 65 mph). The vehicle lost propulsion and displayed brake system warnings. After reaching the shoulder, the vehicle also lost hazard lights while disabled in heavy rain. The vehicle was towed via Hyundai Bluelink to a Hyundai dealership and removed from service. The occupants at the time of the incident included my wife and my minor child. The loss of propulsion, braking warnings, power steering, and hazard lights created a serious risk of a rear-end collision and injury. Due to repeated and escalating safety-related failures involving electrical, braking, and steering systems, I no longer consider the vehicle safe to operate. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Vehicle propulsion system failed, as a result vehicle rolled down an inclined driveway in to the street and was stuck in the middle on the street in traffic. Vehicle had started normally, was able to shift into Drive, no obvious warning lights or error messages displayed. Vehicle would shift into Drive/Park/Reverse as required but would not move. Upon shutdown an restart two warning lights were display but Vehicle would still not move. Vehicle only had 168 miles on the odometer. Vehicle is a Hybrid, engine was running and Battery charged. Apparently the problem was a failed "Over the Air Software Update", this was corrected by Dealer (see attached file). Safety issue is that the Vehicle, 1 Failed to display any error regarding a Failed Update, 2 Failed to immobilize the Vehicle allowing to move in an unsafe state, 3 Failed to notify Owner that Updates had been done, 4 Proceeded with an over thew air Update that could potentially place the Vehicle in an unsafe state.

I purchased a brand-new Hyundai vehicle on [XXX] from Dublin Hyundai. Since purchase, the vehicle has exhibited repeated, serious defects that compromised the safety of my [XXX] baby and family. Timeline of Events: [XXX] – Vehicle purchased new. Safety concerns arose within weeks of ownership. July 16, 2025 – Vehicle dropped off for major issues: camera display failures, heads-up display malfunctions, and random security errors. Vehicle remained in service for over two weeks. August 2, 2025 – Returned with the check engine light on and a scratch on the deck. August 3–4, 2025 – Dropped off again; dealership instructed that the fuel level must remain between 50–70%. August 11, 2025 – Dropped off again; a loaner vehicle provided was unsafe — gear shift failure, body control system errors, infotainment failure, and inability to lock the vehicle. This put my baby’s safety at direct risk as the loaner could not be secured or reliably driven. August 19, 2025 – Vehicle returned with new scratches and multiple issues still unresolved. Late August 2025–Present – Vehicle was relocated to San Jose without my consent. I only know its location from the Hyundai app, which frequently alerts: “Battery level is below normal. Please check that vehicle lights and accessories are switched off to avoid battery drain.” I have not been provided proper updates from Hyundai or the dealership. Safety Risk: Repeated mechanical and electronic failures in both the new vehicle and the loaner. Vehicle is unreliable, unpredictable, and unsafe for transporting a young child. Manufacturer and dealer have failed to provide a safe, operable vehicle despite multiple repair attempts. I am filing this complaint because these issues pose a serious safety risk to me, my infant child, and other drivers on the road. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

On June 30, 2025, I was driving at about 55 mph with the smart cruise on. A message appeared on the left side of the dash (in the left circular screen) that said “Conditions for smart cruise have not been met”. And the cruise turned off, Then a second message appeared that said the engine has been put on idle. At that time I tried to use the gas pedal and got no response. Fortunately I was near a parking lot on my left and had enough momentum to pull in and park. I turned the Tucson off and restarted it and was able to continue to drive. I took the Tucson to the dealer and they tried to duplicate the issue, but were unable to do so. Then the ran a diagnostic, but said it indicated everything came back as normal. I purchased this Tucson Limited hybrid on 1/23/2025 so the fact that the dealer couldn’t duplicate the incident didn’t surprise me. I believe that this was caused by a software problem even though the diagnosis by the dealer indicated everything was normal and in range. However, I believe that their equipment and/or their technical expertise was insufficient to identify the problem. You can imagine the danger if this occurs on an interstate or other highway where speeds are as high as 65 to 70 & higher by some drivers.

Battery Management System failed Safety-Could not drive on interstate. Very unsafe. Dealer inspected problem afterwards. Warning lights appeared at time of problem. No warnings before. No signs of problem before it happened. SYNOPSIS: After driving through a torrential thunderstorm on the interstate (06-13-25) and as we were getting ready to slow down for our exit on the interstate, we hit the brakes and our SUV gave us a warning. The warning said, "Battery Management System Discharge". The SUV is a hybrid. At this point the SUV locked into E V mode. Our SUV would only go 10 mph which was very dangerous. It should be able to go up to 35 mph in E V mode and then past that, switch into gas mode. As stated, we could only go about 10 mph. We made it to our exit and found a spot to pull off the ramp. We let the SUV sit for a few moments and turned it off. We let it sit for a minute and then turned the car back on. The SUV when we turned it back on gave us a check engine light and still would not go over 10 mph. Luckily we were stopping for dinner. We were able to proceed to our destination. After dinner around an hour or so, when turned the vehicle back on, the SUV still gave us a check engine light. but was able to drive normally and switch between E V and gas modes. We made it home safely at the end of the weekend on 06-15-25. On 6-16-25 we took the SUV to be looked at by the dealer we purchased it from. Our phone app showed code DTC P0AA600. We gave the code to the staff. The staff inspected the SUV. The report stated, "customer states stopped driving and there code P0AA600 Battery Warning Light NPF Could not duplicate problem. Tech scanned for codes Code P0AA600 was found as a history code. Tech checked live data and everything came back within spec. Followed the flow chart procedure for the code. Check for BMS isolation faults none found. Check 12volt battery. Battery is good". We drove it home and filed this report.

📌 NHTSA Complaint Description (Modify as Needed) 🚨 Safety Issue: I purchased a brand-new 2025 Hyundai Tucson Hybrid on March 3, 2025, and within 5 minutes of driving and less than 20 miles, the vehicle stalled three times on a busy highway without warning. 🚨 Component/System Failure: The vehicle suffered a complete power loss, rendering it undrivable in the middle of the highway. The gas pedal became unresponsive, and I had no control over the vehicle’s movement. 🚨 Immediate Safety Risk: The sudden stalling on a highway put my family and other drivers at serious risk of a collision. We were left stranded for over 3 hours while waiting for assistance. The vehicle was inspected by Hyundai’s roadside assistance and later towed to the dealership. 🚨 Inspection & Confirmation of the Issue: The dealership and Hyundai’s technical team later diagnosed the issue as a failure in the electric oil pump and the oil pump control unit. Hyundai has not provided a clear resolution and is pushing for repairs, despite the vehicle failing immediately after purchase. The manufacturer and dealership have not provided a pre-delivery inspection report confirming whether the vehicle was defective before delivery. 🚨 No Prior Warning Signs: There were no warning lamps, error messages, or any prior symptoms before the failure. The issue occurred suddenly and repeatedly within minutes of taking delivery of the vehicle. 🚨 Request for Investigation: Given the severity of this mechanical failure and its potential to cause serious accidents, I am reporting this to the NHTSA for further investigation. This issue needs to be addressed immediately before it leads to a fatal accident for another Hyundai Tucson Hybrid owner.