Thread: 2011 135i knock sound
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      12-11-2019, 02:03 PM   #8
christofis135i
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Drives: 2011 135i White/Red
Join Date: Jul 2017
Location: Michigan

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Just now getting the car back from the dealer. Noise is coming from inside my downpipe. Have the AR design catless so looks like I'll be dropping the mid section to see what's going on 🤷🏻*♂️ I'll keep this updated.
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