Quote:
Originally Posted by ruben356
Just to post back on this. I finally got around to tackling this over the weekend. Mines did end up being the belts/tensioner. Anyone know how to verify date stamps on the tensioner? My stretch belt for the AC compressor definitely has 2013 stamped on it, so i believe its OEM. I believe the tensioner is probably OEM as well.
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What parts did you replace. My m5 thinks it's also running a super charger. I do have catless downpipes so don't know of that makes a difference.