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Ryan A Harris
05-30-2012, 02:39 PM
So I have been getting prices on what I need to replace. The O2's are what's on my list for purchase next. I read that the Bosch are a good choice to go with for a '90 SC. But here is my trouble:

I phoned car quest got the quote, there where the cheapest closest to me. So I went there to pick them up. But they showed me a 4 wire sensor that in their cpu system said it was for 89-92 SC. I had thought (and after searching) that the early SC's were a 3 wire sensor. Also during my search I see that rockauto has really great prices on the Bosch O2's.

So here is my question, rock auto is saying that in a 90 SC there are 2 options,
#13942 3 wire heated, OE replacement, 10.8 length $29.51(CDN)
#13950 3 wire heated, OE replacement, 15.4 length, upstream $45.09(CDN)

Do I need the upstream or will the other ones work just fine? I can see by the longer length # that would possibly work with the Kooks long tube headers.(but not needed for this application)

Thnanks guys.

BirdofPrey97
05-30-2012, 03:00 PM
I have just used the 13942 version.

Jason Wild
05-30-2012, 08:29 PM
13950 is what i used since i have short headers. that price is not to bad at all.