I cant solder a wire

[ViPeR_NiPPleX]

i can't see why a crimp connection should be any problem? screw down terminal connector will be bulky

[thechuckster]

I know i have no technical knowledge and this is probably a silly idea, but wouldnt it be easier to source and install another 02 sensor/wire if you're having so much trouble with it?

wideband O2 = expensive
narrowband O2 sensor = fits in pocket and available at any wrecking yard

[takai]

The other thing you can do is grab a pack of mini-crimp spade terminals at DSE. Like these but the mini versions:
http://dseau.resultspage.com/search?...nd&isort=score
And then just cut off the spade bit. This leaves a nice crimpable part which you can use for crimping wires. Just remember to heatshrink over the eventual join.
In the race car i use one of these on every join as well as soldering it and then heatshrink over the top.

EDIT: Here are some pics of what i mean:
http://gallery2.plebeians.net/v/cars...7_004.jpg.html < The Clamps
http://gallery2.plebeians.net/v/cars...8_002.jpg.html < Clamped
http://gallery2.plebeians.net/v/cars...0_001.jpg.html < Soldered, and waiting to be heatshrunk.