The contact owns a 2015 BMW 528I. The contact stated that the coolant level message was displayed on the instrument panel. The contact was then notified of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System); however, the part to do the recall repair was not yet available. The local dealer was made aware of the issue and confirmed that parts were 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 failure mileage was approximately 112,000. VIN tool confirms parts not available.