You'll have either two or four wires to worry about depending on the type of O2 sensor. If four, two of them wil be the same color (probably white) and can be interchanged when hooking them up to the plug. The other two if at all similar to my S70 will be gray and black as will the remaining two wires on the plug. Same color connections are what your going for here.
P.S. I've had a Beck Arnley universal O2 sensor in for about 10,000 miles now and it seems to work with only slightly degraded performance than the original (probably becuase its not Bosch)
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