2018 NISSAN ARMADA Visibilitywiper Problems

We have a Nissan Armada that the Multi AV unit / computer has failed (Part # given to us is 283876GY4D). The vehicle is barely 4 years old. We were quoted a $3,800 repair and Nissan has told us there is no help they can provide. Despite having purchased a 7 year 100,000 mile limited warranty this part isn't covered. Investigating online into the issue we have found that this component is problematic in many vehicles and has service bulletins associated with it. Nissan is stating that because it is GPS, Radio, and cabin comfort it is not a safety issue. HOWEVER, it goes beyond that. We have stated several times to Nissan, that as this unit continuously reboots and malfunctions the windshield defrost / fog clearing aspect of the vehicle does not work. We have had several instances where we've had to pull over in less than desirable locations...