Are all 4 (Banks 1 & 2, Upstream & Downstream) o2 sensors on a 1999 Isuzu Trooper 3.5L V6 the same part number?
There are a lot of vendors that sell sets of 4 at reasonable prices, but each o2 sensor they send is the same parts number.

 

Greetings this is my most memorable post to this board. finding a discussion about Isuzus is perfect. I have been working down my codes and apparently can't dispose of the ones highlighting the O2 sensor situated in bank 1 sensor 1. I needed to confirm that the traveler side of the vehicle is bank 1. is that right?



192.168.100.1 192.168.1.1

 

Yes, all the same p/n, but quality differs greatly. Some have crappy connectors, etc. Get either Denso or NGK. Rock Auto has Denso for $22 ea. Don't get Bosch or cheap crap.