CarKrayz

I have the 07 GS350 AWD
I did as much research as possible and coming to you guys for a double confirmation.
I know the bank 1 sensor 1 is the Air Fuel Ratio sensor.
Sticking with OEM which are Denso, I went straight to the Denso website to try to place an order.
Apparently they describe the sensors with Left or Right side.
234-9051 is the upstream left side
234-9058 is the upstream right side
Called their customer service line and was no help on decision.
Narrowed it down to 80% to buy the upstream right side.

Any confirmation would be greatly appreciated.
Thanks in advance

Scraape

sensor 1 will always be upstream. bank 1 will always be the side that cylinder 1 is on

CarKrayz

Yes, totally agree however we are still at a uncertainty on which side is the Right side and which side is the Left side.
If we are standing outside in front of the engine, the Right side is the Driver side.(USA)
If we are inside the car, the Right side is the Passenger side.(USA)

To have a direct relation with the headlights and sensor here in the USA which the passenger side headlight is the Right side.

Bank 1 sensor 1 is on the cylinder 1 side which is on the passenger side
So can we come to a decision that the upstream Right side sensor is the side I need to buy?

Othic

Passenger side sensor closest to the engine

CarKrayz

Thank you! I am going with 234-9058

samsonn25

So there are 4 total O2 sensors.

Each bank has one upstream on the exhaust manifold/header before the cat and one downstream at front of the mid-pipe?

Chinorx3