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xdrive_320i · 07-10-2020, 08:50 AM

This could be because in Eco-Pro, the car aims to keep the RPMs lower to save fuel. People with a muffler delete will notice drone at around 2,000RPM and that's what you may be hearing, although I've never noticed it myself.

07-10-2020, 08:50 AM	#2
xdrive_320i Private 66 Rep 78 Posts Drives: BMW 320i xDrive Join Date: Jul 2020 Location: USA iTrader: (0) Garage List 2016 BMW 320i xDrive [0.00]	This could be because in Eco-Pro, the car aims to keep the RPMs lower to save fuel. People with a muffler delete will notice drone at around 2,000RPM and that's what you may be hearing, although I've never noticed it myself.
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