[PapaSirius]

Hello first time posting, it said this forum is for N47, but I guess close enough since I didn't find one for B47.

anyway, I have a problem that the engine in my F31 sounds very loud inside the car. Here's a video (turn up the sound to max):

https://streamable.com/saii7u

You can clearly hear this horrible diesel sound as if there's no sound insulation at all.

This video is from another person with same engine:

https://streamable.com/u44to3

It sounds much better and much quieter.

I do not know anyone who owns a car with a B47 so it's hard to compare for me IRL.

One person said it might be bad flex pipe, could it be true? I need your opinions what to check next time I am under the car.

Thank you.