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I find all this information great (as usual) when I have to replace my O2 sensors but when do I replace them? I've just read that the sensors should be replaced every 30k, every 60k and every 100k. I have 64k on my 2001 and since I'm changing the fuel filter, spark plugs, serpentine belt and air filter should I be concern about replacing the O2 sensors as well or wait awhile?
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