I've identified this problem as oxygen sensor on Bank 2 Sensor 1

My question is "Which side is Bank 2 on '99 gs300? Passenger? Driver?"

Also, I've come across https://www.clublexus.com/forums/sho...d.php?t=333594

where it says correct denso part number is
(4,5,6 precat) Bank 2 Sensor 1: 234-4630

but oxygensensor.com has
(4,5,6 precat) Bank 2 Sensor 1: 234-4626

But when i searched oxygensensor.com i get the 234-4630 as the part number. Does anybody know if oxygensensor.com fixed the part number?

Also, it seems like other internet vendor still has 234-4626 as the part number for bank 2 sensor 1.

Is there a site where I can search for lexus part number and cross reference it to the correct densor part number?

I am so confused!!!

 

Neither, its an inline engine.


Sensor 1 (S1) refers to the sensor that is located before the catalytic converters.

Sensor 2 (S2) refers to the sensor that is located after the catalytic converters.

 

so Bank 1 sensor 1 and bank 2 sensor 1 would both be located under the hood? Is there a DIY on how to replace them? tutorial? pics anything? Thanks