2002 Toyota Highlander wipers, windshield & visibility problems

While driving a toyota highlander, that we leased on 01/08/2002, we noticed that the vehicle has a problem: when the windows on the rear doors are lowered, the vehicle makes a very loud turbulance noise and vibration occurs, that makes the vehicle difficult to steer. On 01/12/2002, accompanied by my brother-in-law, we visited toyota of cerritos, where I had leased the toyota highlander, and advised them of this problem.

Driver/s side sun visor will not stay up. While driving, it suddenly drops obscuring my vision and putting the driver at extreme risk for an accident (impaired vision of the road). There is no apparent way to fix this problem short of replacing the sun visor (estimated cost of approx. $700 per blogs). This problem has been experienced by many owners of 2002 highlanders as exemplified via "complaint" postings.