Cat convertor and O2 or AF sensor

[TrexRunnerGirl]

Hi again - I have to replace the Cat convertor and some sensors.

I don't think I"m finding the right part numbers.
I have a Denso O2 #234-4162 (Amazon)
Not sure which one is the AF and if it has to be replaced with the Cat convertor.

The convertor I was going to RockAuto and getting: WALKER 53287 Ultra Converter

Can anyone help with the AF # and/or checking I am getting the right numbers?

Plus - what else do I need to get?

thx again

 

[Dezert4Runner]

Here’s a comprehensive thread that should help with the oxygen or A/F sensor.

http://www.toyota-4runner.org/3rd-gen-t4rs/100297-o2-sensor-purchase.html

 

[2ndhandyotaman]

The upstream sensor will be either the A/F ratio sensor or Oxy sensor, depending if you have federal or California emissions. The decal under your hood will tell you if you have Federal or 50 state emissions, as will a print off of your window sticker.

I literally just installed both cats today so this is fresh in my mind. You'll need the Cat, new sensor, gaskets for between the down pipe/cat and the flange joint for between the 1st and 2nd cat plus the gasket for the sensor. You might also need new hardware for the flange joints as well as the upper cross over pipe/cat flange. I had one stud snap off on me, it was the one that's closest to the engine, making it difficult to remove properly. I ended up having to drill through the broken stud, then open it enough for a bolt/nut to hold everything together again. I wasn't able to keep the new hole centered enough while drilling to use a tap, so a bolt and nut were my only quick options for a quick repair.

 

[Ed_C]

Try looking up part #s from a Toyota dealer's online parts store where you enter the VIN, like this one https://parts.conicellitoyotaofconshohocken.com You can email them too, they usually respond in a few hours, make sure you include the VIN