Speedometer on my 2003 Mazda protege went out about a week ago and haven't had the money to fix it. Now that I do I can't figure out which sensor to be replacing. As you can tell I'm new to actually working on my own car so please no insults. But its 5 speed manual and when I asked at O'Reillys they keep asking which sensor. And there is a HUGE price difference between the two. Can anyone tell me which sensor I should be looking for?