Honda/NTK O2 sensor (redux)

[Dan]

I realize that only the Civic VX has the correct sensor, and all other
Civics don't.  The sensor I have terminates into two connectors, a 
three pin and a two pin.  The sensor does look similar to the one
pictured at FJO-Enterprises.  There is the same mid-connector (in fact
two of them), and then it goes to the two connectors and a bracket.
The website claims the hex size is 22mm and the thread size is 18x1.5mm.
My sensor seems to be smaller than that.  I'm not sure about either
size, but the hex nut is clearly smaller than my 22mm O2 wrench socket.

I guess my real question is, is it possible that I could have a WB O2
sensor with a smaller hex nut and two connectors instead of the
standard stuff.  Are there any 5-wire NTK sensors which aren't wideband?
If there aren't, it pretty much answers whether this is wideband or
not.

dan
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