Hi All
Just thought I'd revive this thread as I feel like I may be having a similar problem.
On my e92 m3, when accelerating very gently (between 1-2k RPM, I hear this little jingle sound that is coming from underneath the car, almost underneath the drivers seat. The sound can be heard on the video posted below at around 8 seconds in (you have to listen carefully to catch it). It literally sounds like a little tambourine is being shaken and I have to drive with the windows down to hear it.
The other key thing to note here is that this noise ONLY starts when the car is warm and has been driven around for 10/mins from cold). I do not hear the sound when the car is cold (driving the car when its cold is the only time I can enjoy not putting up with this noise which is frankly a little bit embarrassing). Also, the sound only comes when driving, not in Neutral revving.
I did alot of reading around on this and it seems to me like there are several potential culprits: donut gasket that connect some exhaust pipes, a bracket that's loose, a mounting thats loose, heat shield (though my mechanic confirmed no issues with this).
The cars performance is generally ok, a little bit sluggish at times but I'm not a fast driver (lots of speed restrictions where I live).
I'd be very grateful if anyone can advise or offer any similar experience and how you went about it and what the issue could be.
Thank you.
https://youtube.com/shorts/qgFbZHdGVoQ