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Discussion Starter #1
I was about to order up some new Denso 02 sensors and I just wanted to make sure with you guys that there is no difference between california emission standard O2 sensors and Federal emission standard O2 sensors. I don't think so as its just a one wire but just wanted to be sure...

Denso part# 234-1057
 

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Yes there is a difference. Cali spec cars have 4 wire sensors and they screw in. While the federal only has one wire and has the flange to bolt it on.
 

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Discussion Starter #3
Crap I just remembered that my car was orginaly purchaced in Alabama I think it was. That explains why my dumb-arse didn't couldn't see any difference.

Thanks!
 
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