The contact owns a 2019 Jeep Grand Cherokee. The contact stated that while attempting depress the brake pedal, the vehicle failed to respond. The contact stated that after several seconds the vehicle responded as intended. The vehicle was taken to an independent mechanic to be diagnosed; however, the diagnosis was unknown. The vehicle then taken to the dealer where the technician informed the contact that there was no failure with the brakes. The vehicle was not repaired. The contact received notification of NHTSA Campaign Number: 24V838000 (SERVICE BRAKES, HYDRAULIC); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure, however, was unable to confirm when parts would be available. The failure mileage was unknown. VIN tool confirms parts not available.