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      03-19-2024, 08:52 AM   #9
Brandon_2011_135i
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Drives: 2011 BMW 135i, 2012 Audi A4
Join Date: Oct 2023
Location: Aurora, IL

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I have put maybe 4-5 drives in the car, it's not my daily driver. But no CEL codes yet, when usually it was 1-2nd drive. So I'm considering the matter resolved.

So in my case, FBO with HFC, MHD Stage2+, no CEL codes AFTER a new O2 sensor. Your results may vary!
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