Thread: Post cat O2 sensor's.
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      04-01-2017, 06:20 PM   #1
fedorE90
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Drives: 2007 335i
Join Date: Sep 2013
Location: bellingham wa

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Post cat O2 sensor's.
I am having a hard time figuring out how to replace the gray sensor. I can get my wrench on it and loosen it but i don't see a way of removing it and installing a new one easily. This is the post cat sensor.
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