The contact owns a 2015 Kia Rio. The contact received notification of NHTSA Campaign Number: 23V652000 (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 vehicle was taken to a certified mechanic who diagnosed and determined that the failure was caused by the catalytic converter failure. The vehicle was taken to the dealer who confirmed that parts were not yet available. The dealer had not diagnosed the vehicle. The manufacturer was made aware of the issue. The failure mileage was unknown. Parts distribution disconnect.