O2 Sensor B4

I have a 2000 B4 RSK REV-C and on two separate occasions I got a CEL and the first time 41 and the second time 32. The CEL usually turn itself off before i can pull over and jump the wires to pull the code.

the car does run odd at times, the idle will surge and than settle out and run fine. it also has stall twice. other times it feels like it misfires then it will run fine after a couple of hicups

I plan on just changing both sensor which I believe they have the same part number. I have the japanese part number 22690-AA440 and i was wondering if there another alternative part. I live in Japan and all the places that I can find will sell this O2 sensor for $350 each.

I tried typing this part number into a couple US dealership online part ordering site and it doesnt pop up.

Is there another alternative OEM part that will work say from a WRX for a cheaper price.

Thanks

Bosch LS02 should sort you out if you're rev C.

will this fit on a Rev-B?

Sorry to revive an old thread.