> I just CC John on this if he in fact is the 02 guru.

Nah, I'm just the biggest loudmouth. I can't take credit for the O2
gauge thingy; that idea I stole from Dennis "guskersthecat", with the
I4 in his '90
<http://my.tbaytel.net/guskers/gauges.html>

For the O2 sensor all you need is the one with three wires. The two
white wires are for the heating element, and they splice to the 2-pin
connector (polarity doesn't matter). The black wire connects to the
green wire with the single rubber booted spade connector. Definitely
cheaper to get the generic and splice wires, re-using your old
connectors.

--
John Bange
'90 Vanagon - "Geldsauger"