I have a 2000 Honda Accord, 2.3L L4 with a 5-speed manual transmission. Recently, the speedometer has been sporadic- sometimes accurate, sometimes bouncing around, but mostly sitting at 0. I replaced my VSS, which seemed to help, but only a week or so after I installed it. It works more consistently now. There is a noticeable increase in performance when the speedometer engages compared to when it sits at 0.