2004 Honda Civic Ex O2 upstream sensor help

[wjcarpender]

I have a 04 Civic Ex, the O2 sensor is bad, I know its a special wideband one but I just can't bring myself to pay $200-$390 for it. I have look at junk yards and done some internet searches no luck. Does anyone have any suggestions?

 

[lowlife9]

yes only use DENSO or NTK i can't stress that enough if you don't shell out the cash now you will pay for it down the road. i recently purchase a DENSO wideband plug and play for under $100 dollars at advanced auto parts on sale though im sure the EX plug will be slightly more. also you don't want a used plug who knows how long it will last then your back in the same boat with a lighter wallet. just pull your skirt up and get a new plug.

 

[RonJ]

How are you sure that the O2 sensor is bad?