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      06-29-2019, 04:26 PM   #9
knightarmor
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Drives: 2017 M3
Join Date: Jan 2015
Location: Washington

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If you leave the A/C on constantly (like literally don't turn it off prior to turning off the vehicle) try turning it off before turning off the car and then turning it on after turning the car on. My wife's X1 had the same problem, I noticed she would leave the A/C system just on when turning the car off. I told her to start turning it off before turning the vehicle off and the smell has gone away.

My theory is that some vents stay open when you leave the A/C on prior to turning off the car and this causes the unpleasant damp odor over time.

It's been about a month since since we started making sure the A/C is off prior to turning off the car and so far so good.
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