The contact leased a 2025 Kia Sorento. The contact stated that while driving, the vehicle failed to increase over 20 MPH. The 20 MPH limited message was displayed. The brake pedal was hard to depress. The driver pulled over and called the salesman at the dealer, who discussed red flags. The contact turned the vehicle off and restarted. While driving 45 MPH, turning left, the brake pedal was applied, but the brakes violently pumped upwards for about nine car lengths. The vehicle eventually slowed down. The speed decreased from 40 MPH to 20 MPH, and he crashed into a Toyota Corolla stopped at the light. There was an unknown abnormal warning sound detected. There were no reported injuries, airbags, fire, or police report filed. The vehicle was towed to the local dealer, where it was diagnosed that the bumper was cracked and two unknown sensors were damaged. The vehicle was not repaired. The manufacturer was contacted, who investigated the failure and determined that the brakes and smart cruise control were working as designed. Additionally, informed him not to utilize the cruise control in the city, read the manual, and learn the vehicle. The approximate failure mileage was 65.