one running board missing, o2 sensor

OK first of all i went to autozone and had them hook up the diagnostics machine and they said that one of my o2 sensors was bad, they think that it is the one farthest away from the catylaic converter b/c i already replaced the one closest to the engine so i think it is that one.does anyone know where to find another sensor that is more reliable at a good price?


ok problem # 2 when i bought the car i didnt notice but there is a missing running board on the passanger side and i was wondering if there is a site that sells them and i am also wondering if they are called running boards b/c when i do a search i dont find much but running boards for trucks

any help would be much appreciated, thanks

step guard?

I believe your talking about the side skirts.

and btw, the code they pulled up should tell which bank (front or rear) the 02 sensor is on. I upgraded all my 02 sensors to Bosch from Advance Auto Parts which are about $70-$80 a piece.