Thread: K&N air filter
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      11-01-2021, 10:35 AM   #10
craeg
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Drives: 2011 335i convertible
Join Date: Sep 2013
Location: Norcal

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I just switched back to a regular filter after running the K&N for a few years and found that an annoying rough idle problem I could never track down has disappeared along with codes about MAF
Appreciate 2
Billfitz8246.00
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