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mike100 · 02-04-2015

I have the $45 Bosch ones from the parts store. They have been thru two smog test cycles now and pass. The originals were German made (also Bosch), but these are of US manufacture. One of the ones i got from Jerry a couple of years back had awfully short leads...I don't know if he is selling a different one now.

the o2's might clean up the low speed hydrocarbons a little too. They don't last forever. For NOx they have to be dead accurate as the sensitivity to lean or rich conditions elevate that gas quite rapidly. I'm sure you'll do better after you swap them for new.

02-04-2015	#19
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,786	Re: Just Failed CA Smog. Now what? I have the $45 Bosch ones from the parts store. They have been thru two smog test cycles now and pass. The originals were German made (also Bosch), but these are of US manufacture. One of the ones i got from Jerry a couple of years back had awfully short leads...I don't know if he is selling a different one now. the o2's might clean up the low speed hydrocarbons a little too. They don't last forever. For NOx they have to be dead accurate as the sensitivity to lean or rich conditions elevate that gas quite rapidly. I'm sure you'll do better after you swap them for new.