Thread: 550i CHeck Engine Light - BMS Stage 2, Downpipes, Exhaust
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      03-31-2016, 04:04 PM   #8
saleen751
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Drives: 2005 545i
Join Date: Feb 2013
Location: so cal

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I had the same issue after installing the same mods. I had a misfire on bank 3 it was a bad coil pack.
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