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Hello I will help you with your question,
There are only a front and rear sensor on your vehicle so you don't have a bank 1 and 2. The sensor 1 is the one closest to the engine or the front one.
Here is a location diagram
Let me know if you have further questions about this
Is this the 3.0 or 3.6 liter engine then it does have four sensors
This is a view from above with the front of the car at the top of the page
You are reading the diagram correctly. Let me know if you have further questions