If I was going to just Google things, I wouldn't bother joining a forum populated by enthusiasts of the same vehicle as mine. I could just go buy a Hanes manual, too.

However, I did Google my question and found this thread, and another on this forum which says Bank 1 is on the passenger side: o2 Sensor Bank 1 Sensor 1.
The other search results resulted in no definitive answer as to where the sensor is located.

I was really hoping to find more on this forum than guys installing stereos and cutting holes in their airboxes.

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2000 Ford Ranger XLT Extended Cab 4-Door 4X4 3.0 V6 Flex Fuel
Lund Genesis Seal & Peel Tonneau Cover | Fog Light Mod | Luminics JDM Yellow Fog Light Bulbs | Throttle Cable Mod | Rubber Hitch Ball Cover | Stant Locking Fuel Cap | Stant Radiator Cap | Generic Rubber Floor Mats | Glock Perfection Decal | E85

Other Vehicles: 2009 Nissan 370Z, 2006 Mercedes Benz C230 Sport, 1992 Mazda Miata