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      03-01-2019, 09:04 PM   #1
mccandless
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Oxygen Sensor Question

I'm installing new downpipes in my 135 N54. My question is do i need to replace the oxygen sensors? How do i know if they are still good? They are very expensive and i don't want to replace perfectly good parts.
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      03-01-2019, 10:49 PM   #2
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Quote:
Originally Posted by mccandless View Post
I'm installing new downpipes in my 135 N54. My question is do i need to replace the oxygen sensors? How do i know if they are still good? They are very expensive and i don't want to replace perfectly good parts.
If they weren't throwing codes before, they shouldn't after. I wouldn't replace them if there's no reason to.
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