I figured out from other sites bank 2 is left side (as you sit in driver's seat).

Since I'm sure none of my O2 sensors has been changed in well over 100,000 miles, I went ahead and changed all 4. I got Bosch OEM style (not universal) for $75 each (delivered). Not too tough a job. Just a little challenging to get the connectors apart.

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Behind every great man is a great woman. Behind every great woman is a great behind.