I need to replace the oxygen sensor on my k20z1 turbo in an EG. I just need to know which sensor i need. I have an option for oxygen sensor or a/f sensor. I was told the OE sensor is a wideband sensor. Plugs look identical so im not exactly sure if its the oxygen or a/f sensor i need. Any help would be great, thanks

 

Same difference. Are you asking if it's wideband or narrowband?