[quote author=Scruff link=topic=11987.msg144729#msg144729 date=1232050071]
I think it's an 02 sensor.
[/quote]
Defo not an 02 senor, they only on the exhaust.
Don't have any Legy manuals to tell ya for sure. Might not be a sensor at all, if its a senor then there has to be some wires or a block connector on it. Might just be a one-way valve on a vacuum line. Like the ones on the Fuel Evaporation Catch Tank.