Quote:
Originally Posted by MMMBRAP
I am sure this has been addressed before, but what is that electronic humming sound when we turn off our cars?
I'm not worried about it (pretty sure it's normal), but just curious what the car is doing when making that sound.
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Watch this. I'm not sure if this is what you mean, but if it is has a good explanation. It's the auxiliary cooling fans that are cooling down your turbos after engine shut down, as the cooling pump is mechanical on the turbo/engine side.
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Wife's Car: 2020 X4M Competition, Alpine White on Black Alcantara and Biege
Current Car: 2018 F80 M3CS, SMB, DCT, ZEC, MPE
Recently Departed: 2020 F87 M2C, LBB, ZEC, 6MT (Euro Delivery Aug. 29, 2019, totaled by an idiot in a Camry who then ran from the scene)
Wife's Prior Car: 2018 F80 M3, Yas Marina Blue, DCT, Black 19s, Carbon Structure Anthracite Cloth/Leather Combination, Driving Assistance Package (Euro Delivery Oct. 9, 2017)