The contact owns a 2016 Ford Explorer. The contact received notification of NHTSA Campaign Number: 24V031000 (STRUCTURE); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact stated while driving on the highway at 75 MPH, the front passengers side A-pillar trim clip detached and separated from the vehicle. The contact was unable to recover the trim clip. The vehicle was taken to a dealer; however, the contact was informed that parts were not yet available. The vehicle was not repaired. The failure mileage was unknown. VIN tool confirms parts not available.