Rear Window Wiper Washer problems of the 2000 Nissan Xterra

Since having my vehicle I have had several problems. Some minor however having a new vehicle I did not expect to have this many problems. I have had a continuous wind noise from my sun roof that has been taken in 3 times to be repaired. I also had to have my rear windshield wiper repaired. Approximately 1 month ago I had to have my brakes replaced and was just informed today (10/10/01) that my fuel pump has gone bad. Several monthes ago I had a "knocking" noise under my hood and as of today I have another "knocking" noise. I just do not feel that my truck should have this many problems with it being so new! my truck stopped 3 times as I was on the highway driving. I had cars in front as well as behind me, it was a very scary and dangerous situation to be in. I hope my complaints do not go unheard as I feel they have at my car dealership. Thank you!.