The contact owns a 2016 BMW 528I. The contact received notification of NHTSA Campaign Number: 24V608000 (ENGINE AND ENGINE COOLING, ELECTRICAL SYSTEM); however, the part to do the recall repair was unavailable. The local dealer was contacted, and it was confirmed that the part was not yet available. 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 at an undisclosed speed, there was smoke was coming from the engine compartment into the cabin of the vehicle through the air vents. The cause of the failure was not yet determined. The vehicle was not repaired. The manufacturer and local dealer were notified of the failure. The failure mileage was 37,000. VIN tool confirms parts not available.