2000 BMW 323I wipers, windshield & visibility problems

I brought my vehicle in to have a problem fixed with the sun roof and mentioned that I had a problem with steering the vehicle during braking at slow speeds. When I got the repair list back from the dealer I noticed that they had replaced a major portion of the braking and steering system. The service seemed rather familiar with the problem and didn't hesitate to replace all of the componets which leads me to believe that they are aware of a signifigant problem with these vehicles and have not reported it.

323I BMW 4 door, 2000. Major problem with all my power windows going out. The service rep at the dealer just shrugs his shoulders and says "it happens". I said that four power windows to go out in six years is excessive. Three of which are hardly ever used since I am the only one ever in the car. He replied that you don't buy a BMW to be easy on the checkbook. I said I bought one because I thought they were reliable. He acted like this happens all the time.