Hi every1
I got a new code P0137. I know I need to replace the oxygen sensor 2 after the cat. However, I spent almost 2 hours now to try to find out which side is the bank 1. I think now I have the answer after watching so many videos. Its the passenger side. Am I correct? There were so many conflicting info on which side is the bank 1. Until I see this video by Atlantic British -
Different rover has different side. I still need to confirm tomorrow day time and see which side has the cylinder 1 slightly sticking out a lil bit. Cylinder 1 side is the bank 1.
This one is for the passenger side bank 1 -

Denso 234-4265 Oxygen Sensor

This is for the driver's side bank 2 -
Denso 234-4266 Oxygen Sensor

 

I would just replace both anyway. Easy to get to and while you can get Denso, I prefer Walker O2 sensors.

 

I thought denso is better brand? its more expensive than walker thats why i got the denso. NO?

 

Denso is a good brand, but you pay the price for the name. Walker is often repackaged Denso for less. If you already bought Denso, then just install it. But I would still do both. Always best to replace in pairs, even the downstream sensor which do noting other than monitor the cats performance.