The contact owns a 2024 Kia Forte GT. The contact stated that while driving approximately 25 MPH on an off-ramp and making a right turn, the lane assist feature had malfunctioned, causing the vehicle to steer and crash into the guard rail. During the incident, the passenger side of the vehicle was damaged along with the guard rail. No injuries were reported. A police report was taken at the scene, and the vehicle was driven away. The vehicle was taken to the local dealer, who was unable to determine the cause of the failure. Previously, while driving, the vehicle had experienced transmission failures, causing the vehicle to jerk and shudder while attempting to accelerate. The RMPS failed to increase over 1.5 and failed to accelerate during normal mode however, in sports mode, the vehicle performed normally. The cause of the failure was not determined. The manufacturer was notified of the failures. The failure mileage was 14,000.