[Jacob_Tyler_Freed]

Originally Posted by djgogls

Hello, just bought a 2019 BMW M5 Comp with 4,000 miles and noticed this noise on startup. Searched the forums but didn’t find anything. Anyone else have this noise ?

https://www.dropbox.com/s/zcc8hfkt3c..._2647.mov?dl=0
Attachment 2165307

I know that this post is old but I know the engine whine that you are talking about.
All the M V8 from the M5 to the X5M and all the current V8 models do this.

It’s because there is no oil pressure at first, so the engine makes a whining noise until pressure is built. This is also presented when the car is stopped and the auto start/stop is activated. When you pull away, you’ll hear the engine whine until pressure is built again.

At the end of the day, it’s 100% normal and does not negatively affect the engine.