[BigKutta]

So every time I get back home and shut off the car, the cooling fans are running normally. Last couple of times I have noticed a buzzing sound (like a leaf is stuck somewhere), and it doesnt sound normal. Is this something to be concerned about? See video link, taken from the front lower grill and ends at the top (open hood). Sounds is prominent only from front grill area.

2020 M2C S55

https://youtube.com/shorts/w2f1eI0o5P4?feature=share

Tried this in technical topics but no response / may be slower there

[(K)]

Is it possible that there actually IS a leaf stuck back there?

[MooMooM2]

Id remove a few things to try to see where the noise really is coming from. Not hard to do, remove carbon brace and right side intake and the fan is right there so you can see if there is some debris on the fan or if the noise really is coming from the fan. I think without getting close to the source you not going to really know.

[BigKutta]

Originally Posted by (K)

Is it possible that there actually IS a leaf stuck back there?

It may be, sure sounds like it. I've driven it a week now and will check when I pull into the garage after a spirited drive. Its been very cold recently and the fans not on when I get back from work.

[BigKutta]

Originally Posted by MooMooM2

Id remove a few things to try to see where the noise really is coming from. Not hard to do, remove carbon brace and right side intake and the fan is right there so you can see if there is some debris on the fan or if the noise really is coming from the fan. I think without getting close to the source you not going to really know.

Thanks, this may be the next step if the sound persists

[MooMooM2]

Originally Posted by BigKutta

It may be, sure sounds like it. I've driven it a week now and will check when I pull into the garage after a spirited drive. Its been very cold recently and the fans not on when I get back from work.

not sure what mode you drive in but if you do sport plus I am pretty sure it will kick in the cooling system faster

[BigKutta]

Originally Posted by MooMooM2

not sure what mode you drive in but if you do sport plus I am pretty sure it will kick in the cooling system faster

Yeah, I'm always in Sport and I shift at pretty high revs during my normal driving so the fan is usually on when I get in the garage. Will try and hear it today, but will do S+

[chris719]

An easy way to get the fan running is if you shut the car off after a bit of driving but before it's warmed up. The cats / turbos / exhaust manifold will be hot because the cold start cycle, so the fan will come on.