In 1999, my now-wife and I bought this Sentra used with 80k miles on it. It is now coming up on summer 2008 and this thing still runs like new! This is the most awesome little car! It has 165k miles on it now, and the only thing we have ever done to it is change the oil every 3k miles. We had the CV joints replaced once (expected from a front wheel drive) and replaced one alternator. Nothing else has ever been done to it, and it still runs like new.
The reliability. How many cars can you run up to 165k miles in a span of 15 years and only spend $200 in repairs on?
Don't change anything about the Sentra, Nissan Corp! The Sentra has always been one of the best and most reliable cars out there! This car has been put to the test and has proved its worthiness!