Hrmm, I'm having a similar problem on my 2001 Nissan Frontier SE, where I'm driving down the road, and suddenly all the gauges on my instrument panel will suddenly quit working. Sometimes the speedometor will go up to full MPH while all the other gauges go down, and the digital odometer will stop working. I don't know what's up with it, I think it may be a loose wire or something...I'll try to take it up to the nissan place after getting through with being brainwashed (i.e., college).