How many and how to replace oxygen sensor

[LOCKONS7RA7US]

Hey whats up guys need help looks like I just have one oxygen sensor ? But I just want to make sure . I have a 1992 explorer eddie bauer edition. And is it as easy as undoing it with a wrench? I have read in Chilton manual that I might have 2-3 oxygen sensors but I can only see the one in front of the cat ? Is that all I have or am I missing some locations , please help clarify thanks

 

[Oxthe3rd]

My 1992 only has the one in front of the cat also.

 

[natenkiki2004]

Pretty sure 93-94 had the 2, one for each bank. The earlier ones were batch fire injectors and the computer didn't need to know what each bank was doing.

You can probably undo it with a wrench and a hammer (hitting the wrench, acting like an impact gun). If that doesn't work, get a torch out and heat the bung.