The contact rented a 2025 Chrysler Pacifica. While the contact's husband was driving at an undisclosed speed, the brake pedal was depressed; however, the vehicle failed to stop. The vehicle was driven to the residence. The contact stated that several days later, the failure reoccurred. The contact stated that while the husband was driving at an undisclosed speed, the brake pedal was depressed, however the vehicle failed to stop as intended. The contact's husband depressed the brake pedal to the floorboard while attempting to stop the vehicle. The rented vehicle crashed into the rear of the vehicle that was in front of the rented vehicle before coming to a complete stop. No warning lights were illuminated. The vehicle was driven to the residence. No injuries were sustained. A Police report was filed. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 26,000.