Oxygen sensor

[FRENCHMan]

Hello everyone
Please, could you tell me how much "oxygen sensor" in my 94 explore
when I want to order the part the person told me two?? and the Haynes manual say one ?????
Thank you very much for advices

sorry but this is the oxygen sensor please

 

[xr75er]

I don't know about your truck but my sons has two.

 

[FRENCHMan]

Yes, I found have two