tips on changing the Bank 1 A/F sensor

[hsdad]

as a newbie, I apologize if this information is on another thread.

I have lived through the dissapointment of pulling a P1155 code (Bank 2), and after spending the 208.00 on the part and ENJOYING the ease of replacement, the vehicle engine light continued to burn over the course of 1-2 weeks of mixed highway and local driving.

A new scan revealed a P1135, Bank 1 (the side opposite the radiator). I was really bummed for a couple of reasons:
1. the way this whole heated A/F error code thing happens
2. the possibility that both A/F's bought the farm at very similar times
3. the resistance across the heater terminals of the now removed/replaced A/F had a good ohmic value.
4. the difficultly in trying to approach a changeout of the Bank 1 sensor even with the vehicle off the ground.

Can someone provide insights at what approach, or what needs to be removed (if anything) to accomplish the changeout of A/F sensor on the converter side? I do have access to a vehicle lift.

some specifics:
2002 Sienna XLE
94K miles

thanks in advance.