Recently I was trying to fond an o2 sensor for a MY99 WRX and encountered a hell of a lot of trouble. Eventually I managed to find a complete listing for o2 sensors by ACA. If somebody can tell me how to do it I could post the relevant page here for the Subaru range. Hopefully it may be of use to others

gc8 02 sensor is just a 3 wire universal. I think the ACA part number is OX203.

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RS Liberty - Because WRX's are only good for parts...

Correct and OX340 is direct fit

would the same sensor fit a 99 gt forester? how much are they? do they have the white plug already attached or do you have to splice your old plug on there?

i have the bosch part number listed for 99 wrx as: 2 269 013 255 and currently have one on its way out to me direct from bosch (supposedly)

Interesting! Bosch told me they don't have a listing for the MY99

well i have doubts of my bosch one even arriving

so how much is the ACA one? and in your listing book is the same one you got also listed for the 99 gt forester?

Its about $120 for the ACA ox203 from coventrys. It comes with crimp connectors and heat shrink and some heat shield conduit. Takes all of 5 mins to hook up onto the original wiring

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RS Liberty - Because WRX's are only good for parts...

Same sensor for the 99 wrx and the Forrester GT OX203-Universal or OX340-Direct Fit

legendary, cheers lads, if my bosch one isn't here by the end of next week i'll grab one

put the image up on photobucket or similar
then get the image code and post it up
if you dont have photobucket or sim send it to me and ill put it up for you