[aymendj]

Dear bimmers,

I have 520d G31 2020 with 72000 km.
I noticed lately that the engine became louder and it makes sound like a Diesel pick-up �� when pushing slowly the gas pedal.

Looking on the engine, noticed that the belt tensioner is vibrating.
First Do you think guys the vibration is normal?
Could that be the cause of the weird sound?

Here is a video showing how the belt tensioner is shaking

Thanks

[justinbleach]

I have the exact same shaking on an identical tensioner on my 2021 540i (B58) after I just replaced my belt. I plan on getting the tensioner replaced just in case.