Karen 
2002 Nissan Sentra Sedan GXE 4dr Sedan (1.8L 4cyl 5M)
computer replacement at 46,000 miles
 This is a fast, fun car to drive but I was unhappy to find that one dealer said a sensor was out causing the transmission to malfunction and then they replaced the sensor again because I didn't make it around the block without the check engine light coming on again.  Two days later after the second fix it happened again.  I took it to another dealer who correctly diagnosed it as the computer itself and replaced it under warranty.  I hope the new computer will last longer than another 46,000 miles!