Replacement O2 sensor - solder or crimp?

[randy paquette]

Hi all,
Haven't posted to the list in ooooh sooooo long.  I have two O2 sensor
questions...
1=2E  I have purchased a "generic" Bosch sensor to hook up to the original
wires in my VW (sorry am currently Auid-less).  I'm comfortable with a
soldering iron but wanted folks opinions as to which is best.  Do I solder
and heat shrink, or use butt splices?  Opinions...
2=2E  I mistakenly purchased a 4 wire sensor but only need a three wire.  C=
an
I used the four wire anyway?

Pleas email me direct as I'm not currently getting list traffic.  Thanks in
advance for any advice.
Randy Paquette...

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