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I saw very little info on this topic so I wanted to share. If anybody needs to replace a bank 2 downstream oxygen sensor on a GS350 AWD (drivers side after-cat), the driver's seat DOES need to be removed along with the center console kick panel. The connector can be found under the carpet by the seat harness. Just finished mine last night. I hope this helps!
Also a fun fact the awd vs rwd the rwd do not have that hump under your leg
Another random AWD vs RWD is that in RWDs the accelerator pedal is attached to the floor and hinged at the bottom, and the pedal is a sort of rectangle shape, but on the AWD it's attached to the firewall and hinged at the top, and the pedal is more like a squished oval. I think the bottom-hinged RWD pedal looks more befitting a sport sedan, but I get why the AWD has to have a different setup.
p0057/ o2 sensor replacement
