What is the easiest way to change the passanger side front O2 sensor? I can see it but I can not get my hands or tool to it or the connector. Also where is the best (cheapest) place to find them (all 4).
Thanks,

 

Remove the plastic inner fender, makes it easy. And do not change the rear ones unless you have to. The only purpose they serve is to check that the cats are still there. They have noting to do with fuel mix or timing. Autozone has them for under $50 a peice.