Humming noise after donuts in snow ?

hamiddal · 12-10-2025, 08:21 PM

2021 BMW M440i — after doing donuts in snow, my car makes a whiny/buzzing noise at idle (Park/Neutral/D at 0 km/h). Noise is loud inside the cabin, quieter outside, and changes pitch with RPM. Disappears once I rev to ~1000 RPM or start driving. Scan shows P05A1 (active grille shutter) code, but the sound seems to come from the steering/engine area. Car drives 100% normally

Video clip of sound:

View post on imgur.com

unluky · 12-11-2025, 07:30 AM

Kinda sounds like a vibration in the video - can you feel it too? Maybe some snow got packed somewhere pushing something against the exhaust etc that is making the exhaust resonate into the cabin?

Maybe an under carriage wash out and see if that helps?

12-10-2025, 08:21 PM	#1
hamiddal New Member 7 Rep 18 Posts Drives: F32 435i RWD Join Date: Nov 2023 Location: Canada iTrader: (0)	Humming noise after donuts in snow ? 2021 BMW M440i — after doing donuts in snow, my car makes a whiny/buzzing noise at idle (Park/Neutral/D at 0 km/h). Noise is loud inside the cabin, quieter outside, and changes pitch with RPM. Disappears once I rev to ~1000 RPM or start driving. Scan shows P05A1 (active grille shutter) code, but the sound seems to come from the steering/engine area. Car drives 100% normally Video clip of sound: View post on imgur.com
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12-11-2025, 07:30 AM	#2
unluky Major 8123 Rep 1,311 Posts Drives: 04 z4 3.0 Sport & 15 X5 35i XD Join Date: Aug 2013 Location: Sedalia, MO iTrader: (0) Garage List 2015 BMW X5 XDrive 35i [0.50] 2004 BMW Z4 3.0 Spo ... [0.00]	Kinda sounds like a vibration in the video - can you feel it too? Maybe some snow got packed somewhere pushing something against the exhaust etc that is making the exhaust resonate into the cabin? Maybe an under carriage wash out and see if that helps? __________________ 2015 X5 XDrive 35i - 2004 Z4 3.0 Sport
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