My 2004 has just under 200,000 miles on it. It's the best car I've ever owned. The only thing that doesn't work is the dashboard tachometer. For about 1000 miles it stopped working intermittently, now the needle sits at 0. The speedometer gives accurate readings, and the car runs and shifts great. I recognize that I don't really need a tachometer, and never paid a lot of attention to it. It's just a cosmetic thing - I like things to work the way they were designed to work. If it can be fixed easily and cheaply, I'll probably do it. I'm not even sure where the tachometer sensor is, whether it's separate from the speedometer sensor, and how the mechanism works. If anyone has any experience or insight into this, please share.

 

The tachometer is controlled by the ECM. Either the crank signal or the cam signal or both are used by the ECM to determine engine speed. A quick test is to hook up an OBDII reader which can read engine RPM. If either crank or cam signal is missing your engine will run rough or not at all. Most likely it is the instrument cluster that is bad.

 

IMO, meter itself maybe OK. The electronic signal driving the meter is in question.