P0031 O2 Sensor Bank 1 Sensor 1

[bp1021]

Hi,

I've searched this forum for an answer to replace this sensor and just wanted a confirmation. Is the replacement for upstream, on the driver's side?

I have a 04 v8 sport.

Is this the correct part?
https://www.amazon.com/Denso-234-4261-Oxygen-Sensor/dp/B0016NBBQW

Thanks!

 

[Brian3676]

I think that's the downstream o2... at least it was on my 08.

You want upstream

 

[bp1021]

I think that's the downstream o2... at least it was on my 08.

You want upstream

Thanks for the quick reply. I'm a bit confused after seeing this post:
http://www.toyota-4runner.org/4th-gen-t4rs/89785-o2-sensor-replace-p0031-code.html

Can you direct me to the correct part?

Thanks!

 

[Brian3676]

Just look it up on RockAuto or something?

A quick look at the part guide says you want this for a upstream (bank 1 sensor 1) o2 sensor.

https://www.amazon.com/Denso-234-4138-Oxygen-Sensor/dp/B000C5YCUW

 

[bp1021]

Just look it up on RockAuto or something?

A quick look at the part guide says you want this for a upstream (bank 1 sensor 1) o2 sensor.

https://www.amazon.com/Denso-234-4138-Oxygen-Sensor/dp/B000C5YCUW

Thanks!

 

[bp1021]

Finished this today! Used a breaker bar and pb blaster to remove. Thanks for the help!

 

[Whamola]

This was a nightmare fix for me. Whomever put the last one in crossthreaded it. Finally got it out, but had to get a large tap from a machine shop to re-thread fir install. Turned into a several hour job.