Owners/service Manual problems of the 2013 Toyota Avalon

This issue happened while the vehicle was in motion on the highway. Rear sunshade randomly deployed and is permanently stuck in the up position completely blocking rear visibility. Sunshade is supposed to go down when vehicle is placed in reverse, this function no longer works further inhibiting safe vehicle maneuvering. The rear facing backup camera has a statement saying to not rely on the backup camera when backing up, this no longer an option for me as I can no longer clearly see out of the rear window. Night time reversing is virtually impossible with any degree of safety. This appears to be a known issue with Toyota as they replaced a relay in the sunshade in model years after 2014 that seems to have remedied this issue. There is no way manually lower the sunscreen. There's no way to easily swap out the defective relay. There's no way to disconnect the sunshade from the wiring harness. There isn't an independent fuse for the sunshade that can be removed. The sunshade appears to be on a fuse that controls the headlights, taillights, braking system and cruise control system. By removing the fuse this would make my vehicle even less safe the it already is.

The rear power sunshade, which is standard equipment on the limited model, raises on its own and won't go back down causing low visibility. There is no way to manually lower it either.

Carbon monoxide (CO) has been measured in the cabin of the car while driving, when the engine is under load. Also, the smell of engine combustion fumes is included with the CO. Toyota has determined that it is not a "repairable condition". Technical repair manuals do not list the condition, therefore no repair has been made. Toyota has not honored its warranty. I have incurred a financial loss. To date, Toyota has not provided a solution to this safety problem. A letter with details has been sent to NHTSA, dated 1/26/2016.