BMW N55 E90 Whirring noise

moneytrees · Today, 03:26 AM

Hi, i'm trying to figure out what this noise could be. You can slightly hear it in the video. Doesn't come from engine bay, more so from under the car near the cat. It's a whirring but not a constant sound. If I coule describe it somehow, it would be like a pulsating sound. The noise occurs when cold and warm at idle. It's a N55. Thank you in advance!

[img]https://youtube.com/shorts/ZTPBqnJBFv8?si=jdRTVX5WdM7GUGaq[/img]

moneytrees · Today, 03:26 AM

https://youtube.com/shorts/ZTPBqnJBF...RTVX5WdM7GUGaq

Link to video.

Today, 03:26 AM	#1
moneytrees Registered 0 Rep 2 Posts Drives: E91 335i N55 Join Date: Oct 2024 Location: Finland iTrader: (0)	BMW E90 Whirring noise Hi, i'm trying to figure out what this noise could be. You can slightly hear it in the video. Doesn't come from engine bay, more so from under the car near the cat. It's a whirring but not a constant sound. If I coule describe it somehow, it would be like a pulsating sound. The noise occurs when cold and warm at idle. It's a N55. Thank you in advance! [img]https://youtube.com/shorts/ZTPBqnJBFv8?si=jdRTVX5WdM7GUGaq[/img]
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Today, 03:26 AM	#2
moneytrees Registered 0 Rep 2 Posts Drives: E91 335i N55 Join Date: Oct 2024 Location: Finland iTrader: (0)	https://youtube.com/shorts/ZTPBqnJBF...RTVX5WdM7GUGaq Link to video.
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