Your dealer should replace it under warranty. They know it is expensive and shouldn't have issues.
I took my MPE in, explained the issue (droning), and they installed a new one without question.
New one is perfect (no drone, no rattles, no Bluetooth issues).
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2016 M2 | LBB | Executive Pkg.| M Performance Exhaust | Dinan CAI | Fabspeed SportCat | standard-h.com | @standardh_
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