S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

Was it dumb to just order primary O2 sensors? I've never gotten a code for the secondaries....

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Old 03-08-2006, 08:14 AM
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Default Was it dumb to just order primary O2 sensors? I've never gotten a code for the secondaries....

I'm assuming they are a lot easier to replace than the primaries, and it really won't matter as far as labor is concerned. Am I right?
Old 03-08-2006, 08:19 AM
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if you paid out of pocket... should just replace all 4 with zoldman's from vast
Old 03-08-2006, 08:20 AM
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I got Zoldman's. Just wondering how far behind the secondaries are in dying as well.
Old 03-08-2006, 08:21 AM
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I just did all 4, might as well have 4 new ones instead of just 2.
Old 03-08-2006, 08:39 AM
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Default I would replace all four. I think a few on here have replaced the primaries, only to

have the secondaries go right after them.
And, I thought that the secondaries were much more of a pain. There are 4 zip ties on the top of the transmission that keep them to the housing, which make them a pain. Besides, once you are in there and have everything moved around, you might as well do the rest of the work.
Old 03-08-2006, 10:54 AM
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I just replaced the primaries when my B1S1 failed. Didn't see the need to replace all 4.
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