Engine Rattling And Whining Sounds problems of the 2012 Infiniti QX56

Infiniti Qx56 2012 with 100,000 miles started making whining noise at start-up and the engine would run and sputter within 7k miles of a full synthetic oil change. Called dealership after working with local mechanic and they know their is a bulletin on this vehicle that requires and new timing chain be installed. Seems this is almost a 100% fail rate and just is a matter when versus if this will fail. Speaking to Infiniti and Nissan they will not cover one dime of this $4,500 repair even though this is a manufacturing latent defect. I spoke to two dealerships and they do between 30-40 of these $4,500 repairs a month. . . This is simply criminal that there is not a recall on this issue. This is a high luxury vehicle and to have this issue is a crime. Thanks.