Idle noise/vibration on s25d

[woodypa]

Hello everyone!

I own a 2016 F15 s25d with 30k kilometers that i bought second hand and i think it has weird vibration/noise. This is my first diesel car and i know they are more rough than petrol car but still seems weird to me. I changed one of the engine mounts as per recommendation by a local mechanic but the sound/vibration is exactly the same and now he says that is normal for that car.

This is a sample of noise from inside the cabin (you can see that rpms are stable at around 900):

This is video of the engine at idle (The video looks worst than what it looks in person

Is this expected for this engines or there could be something wrong?

Thanks!

[Mr.47]

The n47 are really noisy engine in general not sure why but is sounds like a box truck for some reason.

[woodypa]

I think is a B47 not a N47, i was looking on google and found this video of another B47, seems quieter than mine:

[KRS_SN]

check that the air intake duct isnt loose and rattly

[ianfp]

Originally Posted by KRS_SN

check that the air intake duct isnt loose and rattly

Yes to this! I had precisely this problem when I had my F25. It was very noticeable inside the car with the engine at idle.

[woodypa]

Ok, i'll take a look at the air intake duct, the duct was the issue for you?

Originally Posted by ianfp

Yes to this! I had precisely this problem when I had my F25. It was very noticeable inside the car with the engine at idle.

[woodypa]

So i took it to another mechanic they lifter the car and they looked everywhere for the vibration, it is coming from the bottom of the engine, they say that it is probably a problem with the compensating balance shafts.

This parts:
https://www.realoem.com/bmw/enUS/sho...diagId=11_5712

[James284]

Did you find the issue?