One problem related to o2 sensor has been reported for the 2000 Nissan Altima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Nissan Altima based on all problems reported for the 2000 Altima.
The gauges all go dead in the dash on my 2000 Nissan Altima. This is really very scary as I have really no idea how fast I'm going and just try and go with the flow of traffic when this happens. Living in a very busy city and taking the expressway when necessary poses a threat to myself and other drivers. I have had to pull over and let the car cool and then complete my trip so as to have working gauges. No Nissan dealer or mechanic has been able to offer a solution to the problem and based on my research this seems to be a widespread issue with Nissan. Also, the O2 sensors and the gaskets are bad on this car.