The contact owns a 2014 BMW 528I. The contact stated that while her husband was driving 13 MPH, there was smoke coming through the vents from the AC unit being activated. The contact stated that there was an abnormal odor coming from through the vents causing nausea. 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 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 the part would be available. The failure mileage was unknown. VIN tool confirms parts not available.