The vehicle will not accelerate past 30 mph on the highway. The fuel system will not engage, and the vehicle continues to run on hybrid mode which causes the battery to drain and acceleration to throttle. This occurs on all drive modes and fuel conditions.

While driving on the highway the vehicle lost power and then lowered the transmission gear and would not accelerate over 17mph regardless of pressure on accelerator. I switched from auto hybrid mode over to sport mode so the gasoline engine could be used yet the transmission would not increase power to the tires. I stopped several times and restarted with no corrections. Vehicle battery drained quickly and vehicle alarm told me to pull over to charge battery. Sat for a few minutes to charge battery, put in drive and vehicle went forward to 17-20 mph and would not go any faster. Pedal was to the floor. The vehicle then gave several alarm lights and system failures. I limped the car home and called roadside assistance. Tried to put car in reverse for an easy tow and the car wouldn't move in reverse.

Our 2024 Hyundai Santa Fe Limited Hybrid, which was purchased brand new in Massachusetts in 2024 has been rattling at the passenger side B-pillar since [XXX] and has been in the dealership now 5 times for repairs and 16 service days. They have found that the vehicle is missing spot welds from point of assembly. Hyundai, as repair attempt #5, provided the dealership with documented instructions to hammer and chisel the frame 6.5 inches apart and insert foam NHVpads to see if the rattling would stop, it did not. Hyundai Techline instructed the dealership to repeat this step again. The dealership refused citing major safety concerns with the frame of the vehicle. All documentation including Hyundai Techline guidance is available and submitted with this complaint. Thank you. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Incident Description: I am reporting a recurring and dangerous safety defect involving the ADAS (Advanced Driver Assistance Systems) on my 2024 Hyundai Santa Fe Hybrid. On multiple occasions, the vehicle has exhibited uncommanded steering input. Even when the Lane Keeping Assist (LKA) system is manually disabled by the driver, the vehicle software overrides this command and re-activates the system without driver input, causing unpredictable steering behavior. System Failures & Error Codes: The vehicle intermittently displays a "Check Forward Attention Warning System" failure. Dealership diagnostics have confirmed the following historical fault codes related to module communication: •C164286, C168886, C16B902, C28B981 Related Safety Recalls: This vehicle is currently subject to Recall 265 (NHTSA 24V561000) for main floor wiring harness chafing and Recall 288 (NHTSA 25V808000) for rearview camera wiring tension. I believe the uncommanded steering and camera failures are direct results of the electrical interference or harness damage described in these active safety recalls. Safety Risk: The uncommanded steering override creates an immediate risk of a crash, especially in high-speed highway conditions where the vehicle may unexpectedly pull against the driver's intent.

The rear power liftgate on my 2024 Hyundai Santa Fe Hybrid (VIN [XXX]) repeatedly opened and closed on its own, without any command from the key fob, interior button, or any occupant. This occurred over a period of several months. It happened while the vehicle was parked and, more dangerously, while the vehicle was in motion at normal driving speeds. An un-commanded liftgate opening while driving creates a serious safety hazard: loss of rear visibility, the risk of unsecured cargo being ejected onto the roadway, and the gate striking a person or object when it deploys unexpectedly. The overnight, un-commanded cycling while parked is extensively documented on my home security cameras, which recorded the gate opening and closing repeatedly throughout the night. The dealer (Williams Hyundai, Lansing, MI) diagnosed the cause as a faulty resistance fault in the rear hatch wiring harness assembly, which sent false signal inputs to the vehicle and triggered the motorized latch and actuators. The repair was completed under the New Vehicle Limited Warranty. A secondary effect of the continuous overnight cycling was repeated deep-discharge of the 12V battery, leaving the vehicle dead on multiple mornings. I am reporting this because the un-commanded operation of a motorized liftgate — particularly while the vehicle is moving — is a safety defect that may not be isolated to my vehicle. I have retained service records, the dealer's diagnostic notes, and the home security footage, and can provide them on request. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)