is this a WB02 sensor?

[Rob F]

Reading through my '00 Impreza RS shop manual, I found the description of
the front O2 sensor (also called an A/F sensor in the book) very familiar...

"The zirconium oxide has the property of generating electromotive force when
contacting an oxygen ion, and the electromotive force generated varies
depending on the amount of oxygen ion  The front oxygen (A/F) sensor detects
the amount of oxygen in exhaust gases in a linear form by making use of this
property."

There is also a graph of mixture vs mA (without units of course) that looks
very similar to the one on the WB02 page.

So, is this the same type of sensor that is used on the Honda Civic?  Is
this a big deal?  I mean, I had the impression that the Honda was the rather
rare to have this piece included from the factory.

-Rob
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