The contact owns a 2015 BMW 528I. The contact stated while starting the vehicle, the contact noticed a burning odor coming from the vehicle. There was no warning light illuminated. 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 exceeded a reasonable amount of time for the recall repair. The dealer was not contacted. The manufacturer was not made aware of the failure. The approximate failure mileage was 73,000. VIN tool confirms parts not available.