dee 
2001 Nissan Sentra Sedan GXE 4dr Sedan (1.8L 4cyl 5M)
was good, now bad
 Bought this car almost 4 years ago.  Ran fine until the warranty came off, then suddenly started having problems.  Note: if you hear loud humming when you do hard turns or in cold weather, do NOT let Nissan tell you that's "normal".  I now have a power steering rack that is toast, and will cost $1100 Canadian to replace.  Apparently, the humming was warning me there were problems, but the dealership told me there weren't, UNTIL the manufacturer's warranty came off.  I had purchased the extended warranty, but guess what - they say it doesn't cover it either! It seems I am not alone - there are several reports of this problem, but Nissan just says, too bad, you bought it, we don't care.   